121534224213 has 4 divisors (see below), whose sum is σ = 162045632288. Its totient is φ = 81022816140.

The previous prime is 121534224173. The next prime is 121534224233. The reversal of 121534224213 is 312422435121.

It is a happy number.

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 not a de Polignac number, because 121534224213 - 2³³ = 112944289621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121534224233) 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, 20255704033 + ... + 20255704038.

It is an arithmetic number, because the mean of its divisors is an integer number (40511408072).

Almost surely, 2^121534224213 is an apocalyptic number.

It is an amenable number.

121534224213 is a deficient number, since it is larger than the sum of its proper divisors (40511408075).

121534224213 is an equidigital number, since it uses as much as digits as its factorization.

121534224213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40511408074.

The product of its digits is 11520, while the sum is 30.

Adding to 121534224213 its reverse (312422435121), we get a palindrome (433956659334).

The spelling of 121534224213 in words is "one hundred twenty-one billion, five hundred thirty-four million, two hundred twenty-four thousand, two hundred thirteen".