120100022100021 has 32 divisors (see below), whose sum is σ = 165589275443200. Its totient is φ = 77347821456000.

The previous prime is 120100022100011. The next prime is 120100022100049. The reversal of 120100022100021 is 120001220001021.

It is not a de Polignac number, because 120100022100021 - 2⁶ = 120100022099957 is a prime.

It is a super-2 number, since 2×120100022100021² (a number of 29 digits) contains 22 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 (120100022100011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 642843780 + ... + 643030578.

It is an arithmetic number, because the mean of its divisors is an integer number (5174664857600).

Almost surely, 2^{120100022100021} is an apocalyptic number.

It is an amenable number.

120100022100021 is a deficient number, since it is larger than the sum of its proper divisors (45489253343179).

120100022100021 is a wasteful number, since it uses less digits than its factorization.

120100022100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198937.

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

Adding to 120100022100021 its reverse (120001220001021), we get a palindrome (240101242101042).

The spelling of 120100022100021 in words is "one hundred twenty trillion, one hundred billion, twenty-two million, one hundred thousand, twenty-one".