21012000313 has 8 divisors (see below), whose sum is σ = 21927682368. Its totient is φ = 20096494704.

The previous prime is 21012000311. The next prime is 21012000349. The reversal of 21012000313 is 31300021012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012000313 - 2¹ = 21012000311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012000293 and 21012000302.

It is not an unprimeable number, because it can be changed into a prime (21012000311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237595 + ... + 313807.

It is an arithmetic number, because the mean of its divisors is an integer number (2740960296).

Almost surely, 2^21012000313 is an apocalyptic number.

21012000313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21012000313 is a deficient number, since it is larger than the sum of its proper divisors (915682055).

21012000313 is a wasteful number, since it uses less digits than its factorization.

21012000313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88223.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21012000313 its reverse (31300021012), we get a palindrome (52312021325).

The spelling of 21012000313 in words is "twenty-one billion, twelve million, three hundred thirteen", and thus it is an aban number.