2121125447784 has 64 divisors (see below), whose sum is σ = 6163076390400. Its totient is φ = 595764045504.

The previous prime is 2121125447743. The next prime is 2121125447801. The reversal of 2121125447784 is 4877445211212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106987942 + ... + 107007765.

It is an arithmetic number, because the mean of its divisors is an integer number (96298068600).

Almost surely, 2^{2121125447784} is an apocalyptic number.

2121125447784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121125447784 is an abundant number, since it is smaller than the sum of its proper divisors (4041950942616).

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

2121125447784 is a wasteful number, since it uses less digits than its factorization.

2121125447784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213995782 (or 213995778 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

The spelling of 2121125447784 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-five million, four hundred forty-seven thousand, seven hundred eighty-four".