21300112031 has 16 divisors (see below), whose sum is σ = 23784703488. Its totient is φ = 18908760000.

The previous prime is 21300111991. The next prime is 21300112033. The reversal of 21300112031 is 13021100312.

It is a cyclic number.

It is not a de Polignac number, because 21300112031 - 2³⁰ = 20226370207 is a prime.

It is a super-2 number, since 2×21300112031² (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 = 21300111997 and 21300112015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300112033) 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, 182531 + ... + 275531.

It is an arithmetic number, because the mean of its divisors is an integer number (1486543968).

Almost surely, 2^21300112031 is an apocalyptic number.

21300112031 is a deficient number, since it is larger than the sum of its proper divisors (2484591457).

21300112031 is a wasteful number, since it uses less digits than its factorization.

21300112031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93502.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21300112031 its reverse (13021100312), we get a palindrome (34321212343).

It can be divided in two parts, 21300 and 112031, that added together give a palindrome (133331).

The spelling of 21300112031 in words is "twenty-one billion, three hundred million, one hundred twelve thousand, thirty-one".