21310133213 has 8 divisors (see below), whose sum is σ = 22315801536. Its totient is φ = 20311060000.

The previous prime is 21310133203. The next prime is 21310133231. The reversal of 21310133213 is 31233101312.

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 21310133213 - 2⁴ = 21310133197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310133203) 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, 1642163 + ... + 1655088.

It is an arithmetic number, because the mean of its divisors is an integer number (2789475192).

Almost surely, 2^21310133213 is an apocalyptic number.

21310133213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21310133213 is a deficient number, since it is larger than the sum of its proper divisors (1005668323).

21310133213 is a wasteful number, since it uses less digits than its factorization.

21310133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297555.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21310133213 its reverse (31233101312), we get a palindrome (52543234525).

The spelling of 21310133213 in words is "twenty-one billion, three hundred ten million, one hundred thirty-three thousand, two hundred thirteen".