2120222228021 has 2 divisors, whose sum is σ = 2120222228022. Its totient is φ = 2120222228020.

The previous prime is 2120222228017. The next prime is 2120222228041. The reversal of 2120222228021 is 1208222220212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2116530328900 + 3691899121 = 1454830^2 + 60761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120222228021 - 2² = 2120222228017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120222228041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060111114010 + 1060111114011.

It is an arithmetic number, because the mean of its divisors is an integer number (1060111114011).

Almost surely, 2^{2120222228021} is an apocalyptic number.

It is an amenable number.

2120222228021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120222228021 is an equidigital number, since it uses as much as digits as its factorization.

2120222228021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 2120222228021 its reverse (1208222220212), we get a palindrome (3328444448233).

The spelling of 2120222228021 in words is "two trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty-eight thousand, twenty-one".