102110021220 has 96 divisors (see below), whose sum is σ = 298427351040. Its totient is φ = 26037728640.

The previous prime is 102110021183. The next prime is 102110021227. The reversal of 102110021220 is 22120011201.

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 = 102110021196 and 102110021205.

It is not an unprimeable number, because it can be changed into a prime (102110021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5730525 + ... + 5748315.

It is an arithmetic number, because the mean of its divisors is an integer number (3108618240).

Almost surely, 2^102110021220 is an apocalyptic number.

102110021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102110021220 is an abundant number, since it is smaller than the sum of its proper divisors (196317329820).

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

102110021220 is a wasteful number, since it uses less digits than its factorization.

102110021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21985 (or 21983 counting only the distinct ones).

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

Adding to 102110021220 its reverse (22120011201), we get a palindrome (124230032421).

The spelling of 102110021220 in words is "one hundred two billion, one hundred ten million, twenty-one thousand, two hundred twenty".