120992100100 has 18 divisors (see below), whose sum is σ = 262552857434. Its totient is φ = 48396840000.

The previous prime is 120992100091. The next prime is 120992100113. The reversal of 120992100100 is 1001299021.

It can be written as a sum of positive squares in 3 ways, for example, as 5510389824 + 115481710276 = 74232^2 + 339826^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604960401 + ... + 604960600.

Almost surely, 2^120992100100 is an apocalyptic number.

120992100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120992100100 is an abundant number, since it is smaller than the sum of its proper divisors (141560757334).

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

120992100100 is a wasteful number, since it uses less digits than its factorization.

120992100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209921015 (or 1209921008 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 120992100100 its reverse (1001299021), we get a palindrome (121993399121).

The spelling of 120992100100 in words is "one hundred twenty billion, nine hundred ninety-two million, one hundred thousand, one hundred".