120212221220021 has 16 divisors (see below), whose sum is σ = 137938777619328. Its totient is φ = 102624046200000.

The previous prime is 120212221220011. The next prime is 120212221220053. The reversal of 120212221220021 is 120022122212021.

It is a cyclic number.

It is not a de Polignac number, because 120212221220021 - 2⁶ = 120212221219957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120212221219975 and 120212221220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120212221220011) 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, 39020171 + ... + 41988071.

It is an arithmetic number, because the mean of its divisors is an integer number (8621173601208).

Almost surely, 2^{120212221220021} is an apocalyptic number.

It is an amenable number.

120212221220021 is a deficient number, since it is larger than the sum of its proper divisors (17726556399307).

120212221220021 is a wasteful number, since it uses less digits than its factorization.

120212221220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991212.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 120212221220021 its reverse (120022122212021), we get a palindrome (240234343432042).

The spelling of 120212221220021 in words is "one hundred twenty trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, twenty-one".