2111212121113 has 16 divisors (see below), whose sum is σ = 2228682456000. Its totient is φ = 1994380149312.

The previous prime is 2111212121087. The next prime is 2111212121147. The reversal of 2111212121113 is 3111212121112.

It is a cyclic number.

It is not a de Polignac number, because 2111212121113 - 2²¹ = 2111210023961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111212121813) 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, 26841798 + ... + 26920336.

It is an arithmetic number, because the mean of its divisors is an integer number (139292653500).

Almost surely, 2^{2111212121113} is an apocalyptic number.

It is an amenable number.

2111212121113 is a deficient number, since it is larger than the sum of its proper divisors (117470334887).

2111212121113 is a wasteful number, since it uses less digits than its factorization.

2111212121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82584.

The product of its digits is 48, while the sum is 19.

Adding to 2111212121113 its reverse (3111212121112), we get a palindrome (5222424242225).

Subtracting 2111212121113 from its reverse (3111212121112), we obtain a palindrome (999999999999).

The spelling of 2111212121113 in words is "two trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred thirteen".