21134012031 has 12 divisors (see below), whose sum is σ = 33302079720. Its totient is φ = 12808492080.

The previous prime is 21134012027. The next prime is 21134012041. The reversal of 21134012031 is 13021043112.

21134012031 is a `hidden beast` number, since 211 + 3 + 401 + 20 + 31 = 666.

It is not a de Polignac number, because 21134012031 - 2² = 21134012027 is a prime.

It is a super-2 number, since 2×21134012031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21134011995 and 21134012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134012041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106737336 + ... + 106737533.

It is an arithmetic number, because the mean of its divisors is an integer number (2775173310).

Almost surely, 2^21134012031 is an apocalyptic number.

21134012031 is a deficient number, since it is larger than the sum of its proper divisors (12168067689).

21134012031 is a wasteful number, since it uses less digits than its factorization.

21134012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213474886 (or 213474883 counting only the distinct ones).

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

Adding to 21134012031 its reverse (13021043112), we get a palindrome (34155055143).

The spelling of 21134012031 in words is "twenty-one billion, one hundred thirty-four million, twelve thousand, thirty-one".