2121361154616 has 64 divisors (see below), whose sum is σ = 5822381047680. Its totient is φ = 638742199680.

The previous prime is 2121361154611. The next prime is 2121361154623. The reversal of 2121361154616 is 6164511631212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121361154611) 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, 25549186 + ... + 25632081.

It is an arithmetic number, because the mean of its divisors is an integer number (90974703870).

Almost surely, 2^{2121361154616} is an apocalyptic number.

It is an amenable number.

2121361154616 is an abundant number, since it is smaller than the sum of its proper divisors (3701019893064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121361154616 is a wasteful number, since it uses less digits than its factorization.

2121361154616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51181444 (or 51181440 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

Adding to 2121361154616 its reverse (6164511631212), we get a palindrome (8285872785828).

The spelling of 2121361154616 in words is "two trillion, one hundred twenty-one billion, three hundred sixty-one million, one hundred fifty-four thousand, six hundred sixteen".