21031031113323 has 32 divisors (see below), whose sum is σ = 36480704458752. Its totient is φ = 10450201792800.

The previous prime is 21031031113307. The next prime is 21031031113349. The reversal of 21031031113323 is 32331113013012.

It is not a de Polignac number, because 21031031113323 - 2⁴ = 21031031113307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21031031113293 and 21031031113302.

It is not an unprimeable number, because it can be changed into a prime (21031031113823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1979199573 + ... + 1979210198.

It is an arithmetic number, because the mean of its divisors is an integer number (1140022014336).

Almost surely, 2^{21031031113323} is an apocalyptic number.

21031031113323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21031031113323 is a deficient number, since it is larger than the sum of its proper divisors (15449673345429).

21031031113323 is a wasteful number, since it uses less digits than its factorization.

21031031113323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958409815.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21031031113323 its reverse (32331113013012), we get a palindrome (53362144126335).

The spelling of 21031031113323 in words is "twenty-one trillion, thirty-one billion, thirty-one million, one hundred thirteen thousand, three hundred twenty-three".