21103310203313 has 32 divisors (see below), whose sum is σ = 24267532988160. Its totient is φ = 18198744157440.

The previous prime is 21103310203303. The next prime is 21103310203321. The reversal of 21103310203313 is 31330201330112.

It is a cyclic number.

It is not a de Polignac number, because 21103310203313 - 2³² = 21099015236017 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21103310203303) 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, 368465843 + ... + 368523111.

It is an arithmetic number, because the mean of its divisors is an integer number (758360405880).

Almost surely, 2^{21103310203313} is an apocalyptic number.

21103310203313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21103310203313 is a deficient number, since it is larger than the sum of its proper divisors (3164222784847).

21103310203313 is a wasteful number, since it uses less digits than its factorization.

21103310203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86009.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21103310203313 its reverse (31330201330112), we get a palindrome (52433511533425).

The spelling of 21103310203313 in words is "twenty-one trillion, one hundred three billion, three hundred ten million, two hundred three thousand, three hundred thirteen".