1212122020101 has 4 divisors (see below), whose sum is σ = 1616162693472. Its totient is φ = 808081346732.

The previous prime is 1212122020037. The next prime is 1212122020103. The reversal of 1212122020101 is 1010202212121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212122020101 - 2⁶ = 1212122020037 is a prime.

It is a super-2 number, since 2×1212122020101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122020103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202020336681 + ... + 202020336686.

It is an arithmetic number, because the mean of its divisors is an integer number (404040673368).

Almost surely, 2^{1212122020101} is an apocalyptic number.

It is an amenable number.

1212122020101 is a deficient number, since it is larger than the sum of its proper divisors (404040673371).

1212122020101 is an equidigital number, since it uses as much as digits as its factorization.

1212122020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404040673370.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212122020101 its reverse (1010202212121), we get a palindrome (2222324232222).

The spelling of 1212122020101 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, twenty thousand, one hundred one".