1211010013201 has 4 divisors (see below), whose sum is σ = 1211285434932. Its totient is φ = 1210734591472.

The previous prime is 1211010013183. The next prime is 1211010013219. The reversal of 1211010013201 is 1023100101121.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1211010013183) and next prime (1211010013219).

It can be written as a sum of positive squares in 2 ways, for example, as 446170561600 + 764839451601 = 667960^2 + 874551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211010013201 - 2¹⁷ = 1211009882129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211010013501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137704270 + ... + 137713063.

It is an arithmetic number, because the mean of its divisors is an integer number (302821358733).

Almost surely, 2^{1211010013201} is an apocalyptic number.

It is an amenable number.

1211010013201 is a deficient number, since it is larger than the sum of its proper divisors (275421731).

1211010013201 is an equidigital number, since it uses as much as digits as its factorization.

1211010013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275421730.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1211010013201 its reverse (1023100101121), we get a palindrome (2234110114322).

The spelling of 1211010013201 in words is "one trillion, two hundred eleven billion, ten million, thirteen thousand, two hundred one".