2021000000120 has 32 divisors (see below), whose sum is σ = 4549219567200. Its totient is φ = 808049854848.

The previous prime is 2021000000057. The next prime is 2021000000137. The reversal of 2021000000120 is 210000001202.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 2021000000098 and 2021000000107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10848524 + ... + 11033243.

It is an arithmetic number, because the mean of its divisors is an integer number (142163111475).

Almost surely, 2^{2021000000120} is an apocalyptic number.

2021000000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021000000120 is an abundant number, since it is smaller than the sum of its proper divisors (2528219567080).

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

2021000000120 is a wasteful number, since it uses less digits than its factorization.

2021000000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21884087 (or 21884083 counting only the distinct ones).

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

Adding to 2021000000120 its reverse (210000001202), we get a palindrome (2231000001322).

The spelling of 2021000000120 in words is "two trillion, twenty-one billion, one hundred twenty", and thus it is an aban number.