102210202122021 has 12 divisors (see below), whose sum is σ = 168727952709472. Its totient is φ = 58405829783976.

The previous prime is 102210202121981. The next prime is 102210202122023. The reversal of 102210202122021 is 120221202012201.

It is a happy number.

102210202122021 is a `hidden beast` number, since 1 + 0 + 221 + 0 + 202 + 1 + 220 + 21 = 666.

It is not a de Polignac number, because 102210202122021 - 2¹⁸ = 102210201859877 is a prime.

It is a super-2 number, since 2×102210202122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102210202121985 and 102210202122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210202122023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 811192080271 + ... + 811192080396.

Almost surely, 2^{102210202122021} is an apocalyptic number.

It is an amenable number.

102210202122021 is a deficient number, since it is larger than the sum of its proper divisors (66517750587451).

102210202122021 is a wasteful number, since it uses less digits than its factorization.

102210202122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622384160680 (or 1622384160677 counting only the distinct ones).

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

Adding to 102210202122021 its reverse (120221202012201), we get a palindrome (222431404134222).

The spelling of 102210202122021 in words is "one hundred two trillion, two hundred ten billion, two hundred two million, one hundred twenty-two thousand, twenty-one".