2121022112202 has 64 divisors (see below), whose sum is σ = 5409842031360. Its totient is φ = 603405407232.

The previous prime is 2121022112189. The next prime is 2121022112203. The reversal of 2121022112202 is 2022112201212.

It is a happy number.

2121022112202 is a `hidden beast` number, since 21 + 210 + 2 + 211 + 220 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2121022112203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11953063 + ... + 12129210.

It is an arithmetic number, because the mean of its divisors is an integer number (84528781740).

Almost surely, 2^{2121022112202} is an apocalyptic number.

2121022112202 is an abundant number, since it is smaller than the sum of its proper divisors (3288819919158).

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

2121022112202 is a wasteful number, since it uses less digits than its factorization.

2121022112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24082524 (or 24082518 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2121022112202 its reverse (2022112201212), we get a palindrome (4143134313414).

The spelling of 2121022112202 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred two".