21310032213 has 12 divisors (see below), whose sum is σ = 31842577260. Its totient is φ = 13716802176.

The previous prime is 21310032199. The next prime is 21310032223. The reversal of 21310032213 is 31223001312.

21310032213 is a `hidden beast` number, since 21 + 310 + 0 + 322 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14013114129 + 7296918084 = 118377^2 + 85422^2 .

It is not a de Polignac number, because 21310032213 - 2⁵ = 21310032181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310032223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40823556 + ... + 40824077.

It is an arithmetic number, because the mean of its divisors is an integer number (2653548105).

Almost surely, 2^21310032213 is an apocalyptic number.

It is an amenable number.

21310032213 is a deficient number, since it is larger than the sum of its proper divisors (10532545047).

21310032213 is a wasteful number, since it uses less digits than its factorization.

21310032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81647668 (or 81647665 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21310032213 its reverse (31223001312), we get a palindrome (52533033525).

The spelling of 21310032213 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, two hundred thirteen".