2124124431021 has 16 divisors (see below), whose sum is σ = 3147528957120. Its totient is φ = 1415777877360.

The previous prime is 2124124430971. The next prime is 2124124431029. The reversal of 2124124431021 is 1201344214212.

2124124431021 is a `hidden beast` number, since 212 + 4 + 1 + 2 + 443 + 1 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 2124124431021 - 2¹³ = 2124124422829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124124431029) 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, 8346670 + ... + 8597391.

It is an arithmetic number, because the mean of its divisors is an integer number (196720559820).

Almost surely, 2^{2124124431021} is an apocalyptic number.

It is an amenable number.

2124124431021 is a deficient number, since it is larger than the sum of its proper divisors (1023404526099).

2124124431021 is a wasteful number, since it uses less digits than its factorization.

2124124431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948713 (or 16948707 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 2124124431021 its reverse (1201344214212), we get a palindrome (3325468645233).

The spelling of 2124124431021 in words is "two trillion, one hundred twenty-four billion, one hundred twenty-four million, four hundred thirty-one thousand, twenty-one".