2120132021 has 4 divisors (see below), whose sum is σ = 2423008032. Its totient is φ = 1817256012.

The previous prime is 2120131957. The next prime is 2120132057. The reversal of 2120132021 is 1202310212.

It is a happy number.

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 2120132021 - 2⁶ = 2120131957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120131987 and 2120132005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120132621) 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, 151437995 + ... + 151438008.

It is an arithmetic number, because the mean of its divisors is an integer number (605752008).

Almost surely, 2^2120132021 is an apocalyptic number.

It is an amenable number.

2120132021 is a deficient number, since it is larger than the sum of its proper divisors (302876011).

2120132021 is an equidigital number, since it uses as much as digits as its factorization.

2120132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302876010.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2120132021 is about 46044.8913670127. The cubic root of 2120132021 is about 1284.6583235671.

Adding to 2120132021 its reverse (1202310212), we get a palindrome (3322442233).

It can be divided in two parts, 21201320 and 21, that multiplied together give a triangular number (445227720 = T₂₉₈₄₀).

The spelling of 2120132021 in words is "two billion, one hundred twenty million, one hundred thirty-two thousand, twenty-one".