2120222221021 has 4 divisors (see below), whose sum is σ = 2212405795872. Its totient is φ = 2028038646172.

The previous prime is 2120222220913. The next prime is 2120222221037. The reversal of 2120222221021 is 1201222220212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120222221021 - 2³⁵ = 2085862482653 is a prime.

It is a super-2 number, since 2×2120222221021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120222221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120222228021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46091787391 + ... + 46091787436.

It is an arithmetic number, because the mean of its divisors is an integer number (553101448968).

Almost surely, 2^{2120222221021} is an apocalyptic number.

It is an amenable number.

2120222221021 is a deficient number, since it is larger than the sum of its proper divisors (92183574851).

2120222221021 is an equidigital number, since it uses as much as digits as its factorization.

2120222221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92183574850.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2120222221021 its reverse (1201222220212), we get a palindrome (3321444441233).

The spelling of 2120222221021 in words is "two trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".