21000213112301 has 4 divisors (see below), whose sum is σ = 21002395415712. Its totient is φ = 20998030808892.

The previous prime is 21000213112217. The next prime is 21000213112303. The reversal of 21000213112301 is 10321131200012.

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 a de Polignac number, because none of the positive numbers 2^k-21000213112301 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 21000213112301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000213112303) 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, 1091137271 + ... + 1091156516.

It is an arithmetic number, because the mean of its divisors is an integer number (5250598853928).

Almost surely, 2^{21000213112301} is an apocalyptic number.

It is an amenable number.

21000213112301 is a deficient number, since it is larger than the sum of its proper divisors (2182303411).

21000213112301 is an equidigital number, since it uses as much as digits as its factorization.

21000213112301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182303410.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21000213112301 its reverse (10321131200012), we get a palindrome (31321344312313).

The spelling of 21000213112301 in words is "twenty-one trillion, two hundred thirteen million, one hundred twelve thousand, three hundred one".