2121949374013 has 16 divisors (see below), whose sum is σ = 2433299575680. Its totient is φ = 1812658104576.

The previous prime is 2121949373989. The next prime is 2121949374053. The reversal of 2121949374013 is 3104739491212.

It is a cyclic number.

It is not a de Polignac number, because 2121949374013 - 2²⁹ = 2121412503101 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 (2121949374053) 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, 4621833 + ... + 5060161.

It is an arithmetic number, because the mean of its divisors is an integer number (152081223480).

Almost surely, 2^{2121949374013} is an apocalyptic number.

It is an amenable number.

2121949374013 is a deficient number, since it is larger than the sum of its proper divisors (311350201667).

2121949374013 is a wasteful number, since it uses less digits than its factorization.

2121949374013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440676.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 2121949374013 in words is "two trillion, one hundred twenty-one billion, nine hundred forty-nine million, three hundred seventy-four thousand, thirteen".