102100220120 has 16 divisors (see below), whose sum is σ = 229725495360. Its totient is φ = 40840088032.

The previous prime is 102100220077. The next prime is 102100220137. The reversal of 102100220120 is 21022001201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276252712 + ... + 1276252791.

It is an arithmetic number, because the mean of its divisors is an integer number (14357843460).

Almost surely, 2^102100220120 is an apocalyptic number.

102100220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100220120 is an abundant number, since it is smaller than the sum of its proper divisors (127625275240).

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

102100220120 is a wasteful number, since it uses less digits than its factorization.

102100220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552505514 (or 2552505510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102100220120 its reverse (21022001201), we get a palindrome (123122221321).

The spelling of 102100220120 in words is "one hundred two billion, one hundred million, two hundred twenty thousand, one hundred twenty".