2124406033921 has 4 divisors (see below), whose sum is σ = 2124576914692. Its totient is φ = 2124235153152.

The previous prime is 2124406033913. The next prime is 2124406033961. The reversal of 2124406033921 is 1293306044212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936000000 + 1034470033921 = 1044000^2 + 1017089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124406033921 - 2³ = 2124406033913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124406033961) 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, 85421736 + ... + 85446601.

It is an arithmetic number, because the mean of its divisors is an integer number (531144228673).

Almost surely, 2^{2124406033921} is an apocalyptic number.

It is an amenable number.

2124406033921 is a deficient number, since it is larger than the sum of its proper divisors (170880771).

2124406033921 is a wasteful number, since it uses less digits than its factorization.

2124406033921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170880770.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 2124406033921 in words is "two trillion, one hundred twenty-four billion, four hundred six million, thirty-three thousand, nine hundred twenty-one".