2120031421 has 4 divisors (see below), whose sum is σ = 2123907712. Its totient is φ = 2116155132.

The previous prime is 2120031413. The next prime is 2120031469. The reversal of 2120031421 is 1241300212.

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 2120031421 - 2³ = 2120031413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120031395 and 2120031404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120031481) 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, 1937325 + ... + 1938418.

It is an arithmetic number, because the mean of its divisors is an integer number (530976928).

Almost surely, 2^2120031421 is an apocalyptic number.

It is an amenable number.

2120031421 is a deficient number, since it is larger than the sum of its proper divisors (3876291).

2120031421 is an equidigital number, since it uses as much as digits as its factorization.

2120031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876290.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2120031421 is about 46043.7989418771. The cubic root of 2120031421 is about 1284.6380042867.

Adding to 2120031421 its reverse (1241300212), we get a palindrome (3361331633).

The spelling of 2120031421 in words is "two billion, one hundred twenty million, thirty-one thousand, four hundred twenty-one".