120221001000021 has 16 divisors (see below), whose sum is σ = 161761349675520. Its totient is φ = 79414415485440.

The previous prime is 120221000999999. The next prime is 120221001000049. The reversal of 120221001000021 is 120000100122021.

It is not a de Polignac number, because 120221001000021 - 2⁵ = 120221000999989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120221000999970 and 120221001000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221001000071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51649960 + ... + 53927361.

It is an arithmetic number, because the mean of its divisors is an integer number (10110084354720).

Almost surely, 2^{120221001000021} is an apocalyptic number.

It is an amenable number.

120221001000021 is a deficient number, since it is larger than the sum of its proper divisors (41540348675499).

120221001000021 is a wasteful number, since it uses less digits than its factorization.

120221001000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105580796.

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

Adding to 120221001000021 its reverse (120000100122021), we get a palindrome (240221101122042).

The spelling of 120221001000021 in words is "one hundred twenty trillion, two hundred twenty-one billion, one million, twenty-one", and thus it is an aban number.