201220212013 has 2 divisors, whose sum is σ = 201220212014. Its totient is φ = 201220212012.

The previous prime is 201220211993. The next prime is 201220212041. The reversal of 201220212013 is 310212022102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124357085449 + 76863126564 = 352643^2 + 277242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220212013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220212313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610106006 + 100610106007.

It is an arithmetic number, because the mean of its divisors is an integer number (100610106007).

Almost surely, 2^201220212013 is an apocalyptic number.

It is an amenable number.

201220212013 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220212013 is an equidigital number, since it uses as much as digits as its factorization.

201220212013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201220212013 its reverse (310212022102), we get a palindrome (511432234115).

The spelling of 201220212013 in words is "two hundred one billion, two hundred twenty million, two hundred twelve thousand, thirteen".