21310203031 has 8 divisors (see below), whose sum is σ = 23483158160. Its totient is φ = 19213492032.

The previous prime is 21310202909. The next prime is 21310203049. The reversal of 21310203031 is 13030201312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310203031 - 2¹⁹ = 21309678743 is a prime.

It is a super-2 number, since 2×21310203031² (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 = 21310202996 and 21310203014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310203071) 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, 19060446 + ... + 19061563.

It is an arithmetic number, because the mean of its divisors is an integer number (2935394770).

Almost surely, 2^21310203031 is an apocalyptic number.

21310203031 is a deficient number, since it is larger than the sum of its proper divisors (2172955129).

21310203031 is a wasteful number, since it uses less digits than its factorization.

21310203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38122065.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21310203031 its reverse (13030201312), we get a palindrome (34340404343).

The spelling of 21310203031 in words is "twenty-one billion, three hundred ten million, two hundred three thousand, thirty-one".