2131031421 has 24 divisors (see below), whose sum is σ = 3113235840. Its totient is φ = 1404540000.

The previous prime is 2131031411. The next prime is 2131031437. The reversal of 2131031421 is 1241301312.

2131031421 is a `hidden beast` number, since 21 + 310 + 314 + 21 = 666.

It is not a de Polignac number, because 2131031421 - 2¹⁰ = 2131030397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131031394 and 2131031403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131031411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 834096 + ... + 836646.

It is an arithmetic number, because the mean of its divisors is an integer number (129718160).

Almost surely, 2^2131031421 is an apocalyptic number.

It is an amenable number.

2131031421 is a deficient number, since it is larger than the sum of its proper divisors (982204419).

2131031421 is a wasteful number, since it uses less digits than its factorization.

2131031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577 (or 3574 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2131031421 is about 46163.0958775514. The cubic root of 2131031421 is about 1286.8559978561.

Adding to 2131031421 its reverse (1241301312), we get a palindrome (3372332733).

The spelling of 2131031421 in words is "two billion, one hundred thirty-one million, thirty-one thousand, four hundred twenty-one".