121422411521 has 4 divisors (see below), whose sum is σ = 121423144752. Its totient is φ = 121421678292.

The previous prime is 121422411497. The next prime is 121422411527. The reversal of 121422411521 is 125114224121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125114224121 = 46237 ⋅2705933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121422411521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121422411527) 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, 12386 + ... + 492948.

It is an arithmetic number, because the mean of its divisors is an integer number (30355786188).

Almost surely, 2^121422411521 is an apocalyptic number.

It is an amenable number.

121422411521 is a deficient number, since it is larger than the sum of its proper divisors (733231).

121422411521 is an equidigital number, since it uses as much as digits as its factorization.

121422411521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733230.

The product of its digits is 1280, while the sum is 26.

Adding to 121422411521 its reverse (125114224121), we get a palindrome (246536635642).

The spelling of 121422411521 in words is "one hundred twenty-one billion, four hundred twenty-two million, four hundred eleven thousand, five hundred twenty-one".