20141221211013 has 12 divisors (see below), whose sum is σ = 31239445143840. Its totient is φ = 11509269263352.

The previous prime is 20141221211011. The next prime is 20141221211087. The reversal of 20141221211013 is 31011212214102.

It is not a de Polignac number, because 20141221211013 - 2¹ = 20141221211011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20141221211011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68507554993 + ... + 68507555286.

It is an arithmetic number, because the mean of its divisors is an integer number (2603287095320).

Almost surely, 2^{20141221211013} is an apocalyptic number.

It is an amenable number.

20141221211013 is a deficient number, since it is larger than the sum of its proper divisors (11098223932827).

20141221211013 is a wasteful number, since it uses less digits than its factorization.

20141221211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137015110296 (or 137015110289 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 20141221211013 its reverse (31011212214102), we get a palindrome (51152433425115).

The spelling of 20141221211013 in words is "twenty trillion, one hundred forty-one billion, two hundred twenty-one million, two hundred eleven thousand, thirteen".