121313222221 has 8 divisors (see below), whose sum is σ = 122796908640. Its totient is φ = 119830061712.

The previous prime is 121313222179. The next prime is 121313222237. The reversal of 121313222221 is 122222313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121313222221 - 2²⁹ = 120776351309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121313222192 and 121313222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313222291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343095 + ... + 600283.

It is an arithmetic number, because the mean of its divisors is an integer number (15349613580).

Almost surely, 2^121313222221 is an apocalyptic number.

It is an amenable number.

121313222221 is a deficient number, since it is larger than the sum of its proper divisors (1483686419).

121313222221 is an equidigital number, since it uses as much as digits as its factorization.

121313222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262955.

The product of its digits is 576, while the sum is 22.

Adding to 121313222221 its reverse (122222313121), we get a palindrome (243535535342).

The spelling of 121313222221 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred twenty-two thousand, two hundred twenty-one".