21030113031 has 8 divisors (see below), whose sum is σ = 28202233200. Its totient is φ = 13939034112.

The previous prime is 21030113029. The next prime is 21030113057. The reversal of 21030113031 is 13031103012.

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

It is not a de Polignac number, because 21030113031 - 2¹ = 21030113029 is a prime.

It is a super-2 number, since 2×21030113031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21030113031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030113081) 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 7 ways as a sum of consecutive naturals, for example, 20259706 + ... + 20260743.

It is an arithmetic number, because the mean of its divisors is an integer number (3525279150).

Almost surely, 2^21030113031 is an apocalyptic number.

21030113031 is a deficient number, since it is larger than the sum of its proper divisors (7172120169).

21030113031 is a wasteful number, since it uses less digits than its factorization.

21030113031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40520625.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21030113031 its reverse (13031103012), we get a palindrome (34061216043).

The spelling of 21030113031 in words is "twenty-one billion, thirty million, one hundred thirteen thousand, thirty-one".