102102121020 has 48 divisors (see below), whose sum is σ = 285927118848. Its totient is φ = 27223310400.

The previous prime is 102102121013. The next prime is 102102121039. The reversal of 102102121020 is 20121201201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102102120987 and 102102121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310077 + ... + 548043.

It is an arithmetic number, because the mean of its divisors is an integer number (5956814976).

Almost surely, 2^102102121020 is an apocalyptic number.

102102121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102102121020 is an abundant number, since it is smaller than the sum of its proper divisors (183824997828).

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

102102121020 is a wasteful number, since it uses less digits than its factorization.

102102121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245130 (or 245128 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102102121020 its reverse (20121201201), we get a palindrome (122223322221).

The spelling of 102102121020 in words is "one hundred two billion, one hundred two million, one hundred twenty-one thousand, twenty".