2120201121021 has 4 divisors (see below), whose sum is σ = 2826934828032. Its totient is φ = 1413467414012.

The previous prime is 2120201120993. The next prime is 2120201121067. The reversal of 2120201121021 is 1201211020212.

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 2120201121021 - 2³⁰ = 2119127379197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120201122021) 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, 353366853501 + ... + 353366853506.

It is an arithmetic number, because the mean of its divisors is an integer number (706733707008).

Almost surely, 2^{2120201121021} is an apocalyptic number.

It is an amenable number.

2120201121021 is a deficient number, since it is larger than the sum of its proper divisors (706733707011).

2120201121021 is an equidigital number, since it uses as much as digits as its factorization.

2120201121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706733707010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2120201121021 its reverse (1201211020212), we get a palindrome (3321412141233).

The spelling of 2120201121021 in words is "two trillion, one hundred twenty billion, two hundred one million, one hundred twenty-one thousand, twenty-one".