2131133421 has 8 divisors (see below), whose sum is σ = 2844250240. Its totient is φ = 1419386112.

The previous prime is 2131133419. The next prime is 2131133443. The reversal of 2131133421 is 1243311312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2131133421 - 2¹ = 2131133419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131133491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338740 + ... + 344973.

It is an arithmetic number, because the mean of its divisors is an integer number (355531280).

Almost surely, 2^2131133421 is an apocalyptic number.

It is an amenable number.

2131133421 is a deficient number, since it is larger than the sum of its proper divisors (713116819).

2131133421 is a wasteful number, since it uses less digits than its factorization.

2131133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684755.

The product of its digits is 432, while the sum is 21.

The square root of 2131133421 is about 46164.2006429224. The cubic root of 2131133421 is about 1286.8765289499.

Adding to 2131133421 its reverse (1243311312), we get a palindrome (3374444733).

The spelling of 2131133421 in words is "two billion, one hundred thirty-one million, one hundred thirty-three thousand, four hundred twenty-one".