2131132421 has 16 divisors (see below), whose sum is σ = 2397904128. Its totient is φ = 1877352000.

The previous prime is 2131132411. The next prime is 2131132433. The reversal of 2131132421 is 1242311312.

It is a cyclic number.

It is not a de Polignac number, because 2131132421 - 2¹⁸ = 2130870277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131132393 and 2131132402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131132411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31811 + ... + 72623.

It is an arithmetic number, because the mean of its divisors is an integer number (149869008).

Almost surely, 2^2131132421 is an apocalyptic number.

It is an amenable number.

2131132421 is a deficient number, since it is larger than the sum of its proper divisors (266771707).

2131132421 is a wasteful number, since it uses less digits than its factorization.

2131132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40972.

The product of its digits is 288, while the sum is 20.

The square root of 2131132421 is about 46164.1898120177. The cubic root of 2131132421 is about 1286.8763276678.

Adding to 2131132421 its reverse (1242311312), we get a palindrome (3373443733).

The spelling of 2131132421 in words is "two billion, one hundred thirty-one million, one hundred thirty-two thousand, four hundred twenty-one".