2150423212121 has 4 divisors (see below), whose sum is σ = 2263603381200. Its totient is φ = 2037243043044.

The previous prime is 2150423212111. The next prime is 2150423212181. The reversal of 2150423212121 is 1212123240512.

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.

It is a cyclic number.

It is not a de Polignac number, because 2150423212121 - 2³⁰ = 2149349470297 is a prime.

It is a super-2 number, since 2×2150423212121² (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 (2150423212111) 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, 56590084511 + ... + 56590084548.

It is an arithmetic number, because the mean of its divisors is an integer number (565900845300).

Almost surely, 2^{2150423212121} is an apocalyptic number.

It is an amenable number.

2150423212121 is a deficient number, since it is larger than the sum of its proper divisors (113180169079).

2150423212121 is a wasteful number, since it uses less digits than its factorization.

2150423212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113180169078.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 2150423212121 its reverse (1212123240512), we get a palindrome (3362546452633).

The spelling of 2150423212121 in words is "two trillion, one hundred fifty billion, four hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".