21113103202331 has 16 divisors (see below), whose sum is σ = 25182493966848. Its totient is φ = 17307279158400.

The previous prime is 21113103202277. The next prime is 21113103202381. The reversal of 21113103202331 is 13320230131112.

It is a de Polignac number, because none of the positive numbers 2^k-21113103202331 is a prime.

It is a super-2 number, since 2×21113103202331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21113103202297 and 21113103202306.

It is not an unprimeable number, because it can be changed into a prime (21113103202381) 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, 9784190 + ... + 11745491.

It is an arithmetic number, because the mean of its divisors is an integer number (1573905872928).

Almost surely, 2^{21113103202331} is an apocalyptic number.

21113103202331 is a deficient number, since it is larger than the sum of its proper divisors (4069390764517).

21113103202331 is a wasteful number, since it uses less digits than its factorization.

21113103202331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535802.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21113103202331 its reverse (13320230131112), we get a palindrome (34433333333443).

The spelling of 21113103202331 in words is "twenty-one trillion, one hundred thirteen billion, one hundred three million, two hundred two thousand, three hundred thirty-one".