120102100020 has 72 divisors (see below), whose sum is σ = 416353951104. Its totient is φ = 27451908288.

The previous prime is 120102099979. The next prime is 120102100049. The reversal of 120102100020 is 20001201021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120102099975 and 120102100011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47658304 + ... + 47660823.

Almost surely, 2^120102100020 is an apocalyptic number.

120102100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120102100020 is an abundant number, since it is smaller than the sum of its proper divisors (296251851084).

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

120102100020 is a wasteful number, since it uses less digits than its factorization.

120102100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95319149 (or 95319144 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120102100020 its reverse (20001201021), we get a palindrome (140103301041).

The spelling of 120102100020 in words is "one hundred twenty billion, one hundred two million, one hundred thousand, twenty".