102215251020 has 24 divisors (see below), whose sum is σ = 286202703024. Its totient is φ = 27257400256.

The previous prime is 102215251013. The next prime is 102215251031. The reversal of 102215251020 is 20152512201.

It is a super-2 number, since 2×102215251020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851793699 + ... + 851793818.

It is an arithmetic number, because the mean of its divisors is an integer number (11925112626).

Almost surely, 2^102215251020 is an apocalyptic number.

102215251020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102215251020 is an abundant number, since it is smaller than the sum of its proper divisors (183987452004).

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

102215251020 is a wasteful number, since it uses less digits than its factorization.

102215251020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703587529 (or 1703587527 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 102215251020 its reverse (20152512201), we get a palindrome (122367763221).

The spelling of 102215251020 in words is "one hundred two billion, two hundred fifteen million, two hundred fifty-one thousand, twenty".