12121220111202 has 24 divisors (see below), whose sum is σ = 26972444753436. Its totient is φ = 3931206522336.

The previous prime is 12121220111153. The next prime is 12121220111251. The reversal of 12121220111202 is 20211102212121.

12121220111202 is a `hidden beast` number, since 12 + 121 + 220 + 111 + 202 = 666.

It is an interprime number because it is at equal distance from previous prime (12121220111153) and next prime (12121220111251).

It can be written as a sum of positive squares in 2 ways, for example, as 8458203073401 + 3663017037801 = 2908299^2 + 1913901^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9100014433 + ... + 9100015764.

Almost surely, 2^{12121220111202} is an apocalyptic number.

12121220111202 is an abundant number, since it is smaller than the sum of its proper divisors (14851224642234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121220111202 is a wasteful number, since it uses less digits than its factorization.

12121220111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18200030242 (or 18200030239 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12121220111202 its reverse (20211102212121), we get a palindrome (32332322323323).

The spelling of 12121220111202 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred two".