102202212210021 has 36 divisors (see below), whose sum is σ = 185446805640096. Its totient is φ = 53092058286960.

The previous prime is 102202212210019. The next prime is 102202212210029. The reversal of 102202212210021 is 120012212202201.

It is a happy number.

102202212210021 is a `hidden beast` number, since 1 + 0 + 220 + 2 + 212 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 102202212210021 - 2¹ = 102202212210019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102202212209976 and 102202212210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102202212210029) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6703535091 + ... + 6703550336.

Almost surely, 2^{102202212210021} is an apocalyptic number.

102202212210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102202212210021 is a deficient number, since it is larger than the sum of its proper divisors (83244593430075).

102202212210021 is a wasteful number, since it uses less digits than its factorization.

102202212210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407085462 (or 13407085448 counting only the distinct ones).

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

Adding to 102202212210021 its reverse (120012212202201), we get a palindrome (222214424412222).

The spelling of 102202212210021 in words is "one hundred two trillion, two hundred two billion, two hundred twelve million, two hundred ten thousand, twenty-one".