21313102033 has 4 divisors (see below), whose sum is σ = 21350428528. Its totient is φ = 21275775540.

The previous prime is 21313101923. The next prime is 21313102049. The reversal of 21313102033 is 33020131312.

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 21313102033 - 2⁹ = 21313101521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21313102033.

It is not an unprimeable number, because it can be changed into a prime (21313102333) 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, 18662391 + ... + 18663532.

It is an arithmetic number, because the mean of its divisors is an integer number (5337607132).

Almost surely, 2^21313102033 is an apocalyptic number.

It is an amenable number.

21313102033 is a deficient number, since it is larger than the sum of its proper divisors (37326495).

21313102033 is an equidigital number, since it uses as much as digits as its factorization.

21313102033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37326494.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21313102033 its reverse (33020131312), we get a palindrome (54333233345).

The spelling of 21313102033 in words is "twenty-one billion, three hundred thirteen million, one hundred two thousand, thirty-three".