21131132011 has 8 divisors (see below), whose sum is σ = 23054875200. Its totient is φ = 19207844040.

The previous prime is 21131132003. The next prime is 21131132021. The reversal of 21131132011 is 11023113112.

It is a happy number.

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

It is not a de Polignac number, because 21131132011 - 2³ = 21131132003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131132021) 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, 12841 + ... + 205978.

It is an arithmetic number, because the mean of its divisors is an integer number (2881859400).

Almost surely, 2^21131132011 is an apocalyptic number.

21131132011 is a deficient number, since it is larger than the sum of its proper divisors (1923743189).

21131132011 is a wasteful number, since it uses less digits than its factorization.

21131132011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227609.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21131132011 its reverse (11023113112), we get a palindrome (32154245123).

The spelling of 21131132011 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, eleven".