2120011621 has 32 divisors (see below), whose sum is σ = 2841350400. Its totient is φ = 1534256640.

The previous prime is 2120011589. The next prime is 2120011627. The reversal of 2120011621 is 1261100212.

It is not a de Polignac number, because 2120011621 - 2⁵ = 2120011589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120011595 and 2120011604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120011627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29001 + ... + 71281.

It is an arithmetic number, because the mean of its divisors is an integer number (88792200).

Almost surely, 2^2120011621 is an apocalyptic number.

It is an amenable number.

2120011621 is a deficient number, since it is larger than the sum of its proper divisors (721338779).

2120011621 is a wasteful number, since it uses less digits than its factorization.

2120011621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42349.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2120011621 is about 46043.5839287082. The cubic root of 2120011621 is about 1284.6340049888.

Adding to 2120011621 its reverse (1261100212), we get a palindrome (3381111833).

The spelling of 2120011621 in words is "two billion, one hundred twenty million, eleven thousand, six hundred twenty-one".