20102120013213 has 24 divisors (see below), whose sum is σ = 33190273490816. Its totient is φ = 11484910620000.

The previous prime is 20102120013187. The next prime is 20102120013221. The reversal of 20102120013213 is 31231002120102.

It is a de Polignac number, because none of the positive numbers 2^k-20102120013213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102120013223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27625513 + ... + 28343838.

Almost surely, 2^{20102120013213} is an apocalyptic number.

It is an amenable number.

20102120013213 is a deficient number, since it is larger than the sum of its proper divisors (13088153477603).

20102120013213 is a wasteful number, since it uses less digits than its factorization.

20102120013213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55975065 (or 55975062 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20102120013213 its reverse (31231002120102), we get a palindrome (51333122133315).

The spelling of 20102120013213 in words is "twenty trillion, one hundred two billion, one hundred twenty million, thirteen thousand, two hundred thirteen".