21100313401 has 4 divisors (see below), whose sum is σ = 21780968704. Its totient is φ = 20419658100.

The previous prime is 21100313389. The next prime is 21100313467. The reversal of 21100313401 is 10431300112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21100313401 - 2¹⁵ = 21100280633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100313471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340327605 + ... + 340327666.

It is an arithmetic number, because the mean of its divisors is an integer number (5445242176).

Almost surely, 2^21100313401 is an apocalyptic number.

It is an amenable number.

21100313401 is a deficient number, since it is larger than the sum of its proper divisors (680655303).

21100313401 is an equidigital number, since it uses as much as digits as its factorization.

21100313401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680655302.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21100313401 its reverse (10431300112), we get a palindrome (31531613513).

The spelling of 21100313401 in words is "twenty-one billion, one hundred million, three hundred thirteen thousand, four hundred one".