2125937945881 has 4 divisors (see below), whose sum is σ = 2125940885712. Its totient is φ = 2125935006052.

The previous prime is 2125937945851. The next prime is 2125937945917. The reversal of 2125937945881 is 1885497395212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2125937945881 - 2¹³ = 2125937937689 is a prime.

It is a super-2 number, since 2×2125937945881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125937945851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455490 + ... + 2111716.

It is an arithmetic number, because the mean of its divisors is an integer number (531485221428).

Almost surely, 2^{2125937945881} is an apocalyptic number.

It is an amenable number.

2125937945881 is a deficient number, since it is larger than the sum of its proper divisors (2939831).

2125937945881 is a wasteful number, since it uses less digits than its factorization.

2125937945881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939830.

The product of its digits is 43545600, while the sum is 64.

The spelling of 2125937945881 in words is "two trillion, one hundred twenty-five billion, nine hundred thirty-seven million, nine hundred forty-five thousand, eight hundred eighty-one".