221212310012013 has 16 divisors (see below), whose sum is σ = 310499700857280. Its totient is φ = 139701210418944.

The previous prime is 221212310012009. The next prime is 221212310012047. The reversal of 221212310012013 is 310210013212122.

It is not a de Polignac number, because 221212310012013 - 2² = 221212310012009 is a prime.

It is a super-2 number, since 2×221212310012013² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212310014013) 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, 163591356 + ... + 164938037.

It is an arithmetic number, because the mean of its divisors is an integer number (19406231303580).

Almost surely, 2^{221212310012013} is an apocalyptic number.

It is an amenable number.

221212310012013 is a deficient number, since it is larger than the sum of its proper divisors (89287390845267).

221212310012013 is a wasteful number, since it uses less digits than its factorization.

221212310012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328541228.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221212310012013 its reverse (310210013212122), we get a palindrome (531422323224135).

The spelling of 221212310012013 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred ten million, twelve thousand, thirteen".