2133123122421 has 24 divisors (see below), whose sum is σ = 3089555040000. Its totient is φ = 1418216288832.

The previous prime is 2133123122329. The next prime is 2133123122491. The reversal of 2133123122421 is 1242213213312.

2133123122421 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 1 + 231 + 2 + 2 + 421 = 666.

It is not a de Polignac number, because 2133123122421 - 2²⁷ = 2132988904693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133123122491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80789980 + ... + 80816378.

It is an arithmetic number, because the mean of its divisors is an integer number (128731460000).

Almost surely, 2^{2133123122421} is an apocalyptic number.

It is an amenable number.

2133123122421 is a deficient number, since it is larger than the sum of its proper divisors (956431917579).

2133123122421 is a wasteful number, since it uses less digits than its factorization.

2133123122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50473 (or 50470 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 2133123122421 its reverse (1242213213312), we get a palindrome (3375336335733).

The spelling of 2133123122421 in words is "two trillion, one hundred thirty-three billion, one hundred twenty-three million, one hundred twenty-two thousand, four hundred twenty-one".