2120020122021 has 4 divisors (see below), whose sum is σ = 2826693496032. Its totient is φ = 1413346748012.

The previous prime is 2120020121959. The next prime is 2120020122067. The reversal of 2120020122021 is 1202210200212.

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 2120020122021 - 2¹⁹ = 2120019597733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120020122071) 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, 353336687001 + ... + 353336687006.

It is an arithmetic number, because the mean of its divisors is an integer number (706673374008).

Almost surely, 2^{2120020122021} is an apocalyptic number.

It is an amenable number.

2120020122021 is a deficient number, since it is larger than the sum of its proper divisors (706673374011).

2120020122021 is an equidigital number, since it uses as much as digits as its factorization.

2120020122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706673374010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2120020122021 its reverse (1202210200212), we get a palindrome (3322230322233).

The spelling of 2120020122021 in words is "two trillion, one hundred twenty billion, twenty million, one hundred twenty-two thousand, twenty-one".