202121020122210 has 128 divisors (see below), whose sum is σ = 622338261834240. Its totient is φ = 45722810990592.

The previous prime is 202121020122199. The next prime is 202121020122233. The reversal of 202121020122210 is 12221020121202.

It is a happy number.

202121020122210 is a `hidden beast` number, since 2 + 0 + 21 + 210 + 201 + 22 + 210 = 666.

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 63 ways as a sum of consecutive naturals, for example, 551065839 + ... + 551432498.

It is an arithmetic number, because the mean of its divisors is an integer number (4862017670580).

Almost surely, 2^{202121020122210} is an apocalyptic number.

202121020122210 is an abundant number, since it is smaller than the sum of its proper divisors (420217241712030).

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

202121020122210 is a wasteful number, since it uses less digits than its factorization.

202121020122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102498457 (or 1102498451 counting only the distinct ones).

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

Adding to 202121020122210 its reverse (12221020121202), we get a palindrome (214342040243412).

The spelling of 202121020122210 in words is "two hundred two trillion, one hundred twenty-one billion, twenty million, one hundred twenty-two thousand, two hundred ten".