221203132013 has 2 divisors, whose sum is σ = 221203132014. Its totient is φ = 221203132012.

The previous prime is 221203131991. The next prime is 221203132019. The reversal of 221203132013 is 310231302122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211685568649 + 9517563364 = 460093^2 + 97558^2 .

It is a cyclic number.

It is not a de Polignac number, because 221203132013 - 2²⁶ = 221136023149 is a prime.

It is a super-2 number, since 2×221203132013² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221203132019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601566006 + 110601566007.

It is an arithmetic number, because the mean of its divisors is an integer number (110601566007).

Almost surely, 2^221203132013 is an apocalyptic number.

It is an amenable number.

221203132013 is a deficient number, since it is larger than the sum of its proper divisors (1).

221203132013 is an equidigital number, since it uses as much as digits as its factorization.

221203132013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221203132013 its reverse (310231302122), we get a palindrome (531434434135).

The spelling of 221203132013 in words is "two hundred twenty-one billion, two hundred three million, one hundred thirty-two thousand, thirteen".