21152331530013 has 16 divisors (see below), whose sum is σ = 28244426470400. Its totient is φ = 14080902430896.

The previous prime is 21152331529997. The next prime is 21152331530023. The reversal of 21152331530013 is 31003513325112.

It is not a de Polignac number, because 21152331530013 - 2⁴ = 21152331529997 is a prime.

It is a super-2 number, since 2×21152331530013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152331530023) 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, 11332338 + ... + 13066236.

It is an arithmetic number, because the mean of its divisors is an integer number (1765276654400).

Almost surely, 2^{21152331530013} is an apocalyptic number.

It is an amenable number.

21152331530013 is a deficient number, since it is larger than the sum of its proper divisors (7092094940387).

21152331530013 is a wasteful number, since it uses less digits than its factorization.

21152331530013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739856.

The product of its (nonzero) digits is 8100, while the sum is 30.

Adding to 21152331530013 its reverse (31003513325112), we get a palindrome (52155844855125).

The spelling of 21152331530013 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-one million, five hundred thirty thousand, thirteen".