2121122210202 has 24 divisors (see below), whose sum is σ = 4641267414420. Its totient is φ = 700040332800.

The previous prime is 2121122210183. The next prime is 2121122210227. The reversal of 2121122210202 is 2020122211212.

It is a happy number.

2121122210202 is a `hidden beast` number, since 21 + 211 + 22 + 210 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2113211708721 + 7910501481 = 1453689^2 + 88941^2 .

It is a super-2 number, since 2×2121122210202² (a number of 25 digits) contains 22 as substring.

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, 583365127 + ... + 583368762.

Almost surely, 2^{2121122210202} is an apocalyptic number.

2121122210202 is an abundant number, since it is smaller than the sum of its proper divisors (2520145204218).

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

2121122210202 is a wasteful number, since it uses less digits than its factorization.

2121122210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166733998 (or 1166733995 counting only the distinct ones).

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

Adding to 2121122210202 its reverse (2020122211212), we get a palindrome (4141244421414).

The spelling of 2121122210202 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred ten thousand, two hundred two".