211221210003013 has 6 divisors (see below), whose sum is σ = 245706305513766. Its totient is φ = 181046751431112.

The previous prime is 211221210002969. The next prime is 211221210003053. The reversal of 211221210003013 is 310300012122112.

It can be written as a sum of positive squares in only one way, i.e., 210423078605089 + 798131397924 = 14505967^2 + 893382^2 .

It is not a de Polignac number, because 211221210003013 - 2⁹ = 211221210002501 is a prime.

It is a super-2 number, since 2×211221210003013² (a number of 29 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 (211221210003053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2155318469370 + ... + 2155318469467.

It is an arithmetic number, because the mean of its divisors is an integer number (40951050918961).

Almost surely, 2^{211221210003013} is an apocalyptic number.

It is an amenable number.

211221210003013 is a deficient number, since it is larger than the sum of its proper divisors (34485095510753).

211221210003013 is an equidigital number, since it uses as much as digits as its factorization.

211221210003013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310636938851 (or 4310636938844 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211221210003013 its reverse (310300012122112), we get a palindrome (521521222125125).

The spelling of 211221210003013 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, three thousand, thirteen".