21331032101213 has 4 divisors (see below), whose sum is σ = 22585798695420. Its totient is φ = 20076265507008.

The previous prime is 21331032101189. The next prime is 21331032101231. The reversal of 21331032101213 is 31210123013312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15904359352729 + 5426672748484 = 3988027^2 + 2329522^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331032101213 - 2¹⁴ = 21331032084829 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 (21331032109213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627383297078 + ... + 627383297111.

It is an arithmetic number, because the mean of its divisors is an integer number (5646449673855).

Almost surely, 2^{21331032101213} is an apocalyptic number.

It is an amenable number.

21331032101213 is a deficient number, since it is larger than the sum of its proper divisors (1254766594207).

21331032101213 is a wasteful number, since it uses less digits than its factorization.

21331032101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254766594206.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21331032101213 its reverse (31210123013312), we get a palindrome (52541155114525).

The spelling of 21331032101213 in words is "twenty-one trillion, three hundred thirty-one billion, thirty-two million, one hundred one thousand, two hundred thirteen".