120120010021 has 4 divisors (see below), whose sum is σ = 131040010944. Its totient is φ = 109200009100.

The previous prime is 120120009983. The next prime is 120120010033. The reversal of 120120010021 is 120010021021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120120010021 - 2¹⁵ = 120119977253 is a prime.

It is a super-3 number, since 3×120120010021³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120010061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5460000445 + ... + 5460000466.

It is an arithmetic number, because the mean of its divisors is an integer number (32760002736).

Almost surely, 2^120120010021 is an apocalyptic number.

120120010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120120010021 is a deficient number, since it is larger than the sum of its proper divisors (10920000923).

120120010021 is a wasteful number, since it uses less digits than its factorization.

120120010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10920000922.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120120010021 its reverse (120010021021), we get a palindrome (240130031042).

The spelling of 120120010021 in words is "one hundred twenty billion, one hundred twenty million, ten thousand, twenty-one".