102100021111020 has 48 divisors (see below), whose sum is σ = 286039858214880. Its totient is φ = 27211453334016.

The previous prime is 102100021111009. The next prime is 102100021111021. The reversal of 102100021111020 is 20111120001201.

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 = 102100021110987 and 102100021111005.

It is not an unprimeable number, because it can be changed into a prime (102100021111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475484337 + ... + 475699016.

It is an arithmetic number, because the mean of its divisors is an integer number (5959163712810).

Almost surely, 2^{102100021111020} is an apocalyptic number.

102100021111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100021111020 is an abundant number, since it is smaller than the sum of its proper divisors (183939837103860).

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

102100021111020 is a wasteful number, since it uses less digits than its factorization.

102100021111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951185154 (or 951185152 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102100021111020 its reverse (20111120001201), we get a palindrome (122211141112221).

The spelling of 102100021111020 in words is "one hundred two trillion, one hundred billion, twenty-one million, one hundred eleven thousand, twenty".