1020120002120 has 32 divisors (see below), whose sum is σ = 2297362419000. Its totient is φ = 407676016128.

The previous prime is 1020120002089. The next prime is 1020120002129. The reversal of 1020120002120 is 212000210201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 517067417476 + 503052584644 = 719074^2 + 709262^2 .

It is not an unprimeable number, because it can be changed into a prime (1020120002129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11580095 + ... + 11667854.

Almost surely, 2^{1020120002120} is an apocalyptic number.

1020120002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020120002120 is an abundant number, since it is smaller than the sum of its proper divisors (1277242416880).

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

1020120002120 is a wasteful number, since it uses less digits than its factorization.

1020120002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23249057 (or 23249053 counting only the distinct ones).

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

Adding to 1020120002120 its reverse (212000210201), we get a palindrome (1232120212321).

The spelling of 1020120002120 in words is "one trillion, twenty billion, one hundred twenty million, two thousand, one hundred twenty".