120021120010021 has 16 divisors (see below), whose sum is σ = 127180314774400. Its totient is φ = 112946221152000.

The previous prime is 120021120009971. The next prime is 120021120010069. The reversal of 120021120010021 is 120010021120021.

It is a cyclic number.

It is not a de Polignac number, because 120021120010021 - 2¹⁹ = 120021119485733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021120009983 and 120021120010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021120010081) 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, 64847785 + ... + 66672913.

It is an arithmetic number, because the mean of its divisors is an integer number (7948769673400).

Almost surely, 2^{120021120010021} is an apocalyptic number.

It is an amenable number.

120021120010021 is a deficient number, since it is larger than the sum of its proper divisors (7159194764379).

120021120010021 is a wasteful number, since it uses less digits than its factorization.

120021120010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848220.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120021120010021 its reverse (120010021120021), we get a palindrome (240031141130042).

It can be divided in two parts, 120021 and 120010021, that multiplied together give a palindrome (14403722730441).

The spelling of 120021120010021 in words is "one hundred twenty trillion, twenty-one billion, one hundred twenty million, ten thousand, twenty-one".