102123021220 has 48 divisors (see below), whose sum is σ = 233984874816. Its totient is φ = 37130832000.

The previous prime is 102123021191. The next prime is 102123021227. The reversal of 102123021220 is 22120321201.

It is a happy number.

It is a super-2 number, since 2×102123021220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102123021194 and 102123021203.

It is not an unprimeable number, because it can be changed into a prime (102123021227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1974490 + ... + 2025550.

It is an arithmetic number, because the mean of its divisors is an integer number (4874684892).

Almost surely, 2^102123021220 is an apocalyptic number.

102123021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102123021220 is an abundant number, since it is smaller than the sum of its proper divisors (131861853596).

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

102123021220 is a wasteful number, since it uses less digits than its factorization.

102123021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60172 (or 60170 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102123021220 its reverse (22120321201), we get a palindrome (124243342421).

The spelling of 102123021220 in words is "one hundred two billion, one hundred twenty-three million, twenty-one thousand, two hundred twenty".