21030101313 has 16 divisors (see below), whose sum is σ = 31509985920. Its totient is φ = 12378921984.

The previous prime is 21030101291. The next prime is 21030101317. The reversal of 21030101313 is 31310103012.

It is a de Polignac number, because none of the positive numbers 2^k-21030101313 is a prime.

It is a super-2 number, since 2×21030101313² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21030101292 and 21030101301.

It is not an unprimeable number, because it can be changed into a prime (21030101317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11721568 + ... + 11723361.

It is an arithmetic number, because the mean of its divisors is an integer number (1969374120).

Almost surely, 2^21030101313 is an apocalyptic number.

21030101313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21030101313 is a deficient number, since it is larger than the sum of its proper divisors (10479884607).

21030101313 is a wasteful number, since it uses less digits than its factorization.

21030101313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23444968.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21030101313 its reverse (31310103012), we get a palindrome (52340204325).

The spelling of 21030101313 in words is "twenty-one billion, thirty million, one hundred one thousand, three hundred thirteen".