120012201000021 has 24 divisors (see below), whose sum is σ = 175895757721152. Its totient is φ = 72730487368000.

The previous prime is 120012201000017. The next prime is 120012201000113. The reversal of 120012201000021 is 120000102210021.

It is not a de Polignac number, because 120012201000021 - 2² = 120012201000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120012200999970 and 120012201000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012201004021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3168705 + ... + 15813446.

It is an arithmetic number, because the mean of its divisors is an integer number (7328989905048).

Almost surely, 2^{120012201000021} is an apocalyptic number.

120012201000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120012201000021 is a deficient number, since it is larger than the sum of its proper divisors (55883556721131).

120012201000021 is a wasteful number, since it uses less digits than its factorization.

120012201000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18999593 (or 18999582 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120012201000021 its reverse (120000102210021), we get a palindrome (240012303210042).

The spelling of 120012201000021 in words is "one hundred twenty trillion, twelve billion, two hundred one million, twenty-one", and thus it is an aban number.