210121022221002 has 12 divisors (see below), whose sum is σ = 455262214812210. Its totient is φ = 70040340740328.

The previous prime is 210121022220983. The next prime is 210121022221043. The reversal of 210121022221002 is 200122220121012.

It is a happy number.

210121022221002 is a `hidden beast` number, since 21 + 0 + 1 + 210 + 222 + 210 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 135944849692521 + 74176172528481 = 11659539^2 + 8612559^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11673390123389 = 210121022221002 / (2 + 1 + 0 + 1 + 2 + 1 + 0 + 2 + 2 + 2 + 2 + 1 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5836695061677 + ... + 5836695061712.

Almost surely, 2^{210121022221002} is an apocalyptic number.

210121022221002 is an abundant number, since it is smaller than the sum of its proper divisors (245141192591208).

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

210121022221002 is a wasteful number, since it uses less digits than its factorization.

210121022221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11673390123397 (or 11673390123394 counting only the distinct ones).

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

Adding to 210121022221002 its reverse (200122220121012), we get a palindrome (410243242342014).

The spelling of 210121022221002 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two".