1210212100201 has 4 divisors (see below), whose sum is σ = 1303305338692. Its totient is φ = 1117118861712.

The previous prime is 1210212100193. The next prime is 1210212100231. The reversal of 1210212100201 is 1020012120121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 437782045801 + 772430054400 = 661651^2 + 878880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210212100201 - 2³ = 1210212100193 is a prime.

It is a super-2 number, since 2×1210212100201² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 93093238477 = 1210212100201 / (1 + 2 + 1 + 0 + 2 + 1 + 2 + 1 + 0 + 0 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210212100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46546619226 + ... + 46546619251.

It is an arithmetic number, because the mean of its divisors is an integer number (325826334673).

Almost surely, 2^{1210212100201} is an apocalyptic number.

It is an amenable number.

1210212100201 is a deficient number, since it is larger than the sum of its proper divisors (93093238491).

1210212100201 is an equidigital number, since it uses as much as digits as its factorization.

1210212100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93093238490.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1210212100201 its reverse (1020012120121), we get a palindrome (2230224220322).

It can be divided in two parts, 121021 and 2100201, that added together give a palindrome (2221222).

The spelling of 1210212100201 in words is "one trillion, two hundred ten billion, two hundred twelve million, one hundred thousand, two hundred one".