120102000021 has 40 divisors (see below), whose sum is σ = 184952391360. Its totient is φ = 77632458048.

The previous prime is 120102000019. The next prime is 120102000023. The reversal of 120102000021 is 120000201021.

It is an interprime number because it is at equal distance from previous prime (120102000019) and next prime (120102000023).

It is not a de Polignac number, because 120102000021 - 2¹ = 120102000019 is a prime.

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 = 120101999967 and 120102000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102000023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 176736 + ... + 520998.

It is an arithmetic number, because the mean of its divisors is an integer number (4623809784).

Almost surely, 2^120102000021 is an apocalyptic number.

It is an amenable number.

120102000021 is a deficient number, since it is larger than the sum of its proper divisors (64850391339).

120102000021 is an equidigital number, since it uses as much as digits as its factorization.

120102000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344407 (or 344398 counting only the distinct ones).

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

Adding to 120102000021 its reverse (120000201021), we get a palindrome (240102201042).

The spelling of 120102000021 in words is "one hundred twenty billion, one hundred two million, twenty-one", and thus it is an aban number.