121321135106 has 4 divisors (see below), whose sum is σ = 181981702662. Its totient is φ = 60660567552.

The previous prime is 121321135097. The next prime is 121321135213. The reversal of 121321135106 is 601531123121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68071419025 + 53249716081 = 260905^2 + 230759^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330283775 + ... + 30330283778.

Almost surely, 2^121321135106 is an apocalyptic number.

121321135106 is a deficient number, since it is larger than the sum of its proper divisors (60660567556).

121321135106 is an equidigital number, since it uses as much as digits as its factorization.

121321135106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60660567555.

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 121321135106 its reverse (601531123121), we get a palindrome (722852258227).

The spelling of 121321135106 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-five thousand, one hundred six".