21130132231 has 16 divisors (see below), whose sum is σ = 22902062400. Its totient is φ = 19379416320.

The previous prime is 21130132211. The next prime is 21130132249. The reversal of 21130132231 is 13223103112.

It is a cyclic number.

It is not a de Polignac number, because 21130132231 - 2¹¹ = 21130130183 is a prime.

It is a super-2 number, since 2×21130132231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130132199 and 21130132208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130132211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963341 + ... + 1974073.

It is an arithmetic number, because the mean of its divisors is an integer number (1431378900).

Almost surely, 2^21130132231 is an apocalyptic number.

21130132231 is a deficient number, since it is larger than the sum of its proper divisors (1771930169).

21130132231 is a wasteful number, since it uses less digits than its factorization.

21130132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11706.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21130132231 its reverse (13223103112), we get a palindrome (34353235343).

The spelling of 21130132231 in words is "twenty-one billion, one hundred thirty million, one hundred thirty-two thousand, two hundred thirty-one".