2120022211021 has 16 divisors (see below), whose sum is σ = 2515315436928. Its totient is φ = 1761425352000.

The previous prime is 2120022211001. The next prime is 2120022211123. The reversal of 2120022211021 is 1201122200212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2120022211021 - 2⁷ = 2120022210893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120022210986 and 2120022211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120022211001) 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, 73378281 + ... + 73407166.

It is an arithmetic number, because the mean of its divisors is an integer number (157207214808).

Almost surely, 2^{2120022211021} is an apocalyptic number.

It is an amenable number.

2120022211021 is a deficient number, since it is larger than the sum of its proper divisors (395293225907).

2120022211021 is a wasteful number, since it uses less digits than its factorization.

2120022211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146785572.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2120022211021 its reverse (1201122200212), we get a palindrome (3321144411233).

The spelling of 2120022211021 in words is "two trillion, one hundred twenty billion, twenty-two million, two hundred eleven thousand, twenty-one".