121312311122 has 4 divisors (see below), whose sum is σ = 181968466686. Its totient is φ = 60656155560.

The previous prime is 121312311121. The next prime is 121312311157. The reversal of 121312311122 is 221113213121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221113213121 = 43 ⋅5142167747.

It can be written as a sum of positive squares in only one way, i.e., 117572866321 + 3739444801 = 342889^2 + 61151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121312311094 and 121312311103.

It is not an unprimeable number, because it can be changed into a prime (121312311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30328077779 + ... + 30328077782.

Almost surely, 2^121312311122 is an apocalyptic number.

121312311122 is a deficient number, since it is larger than the sum of its proper divisors (60656155564).

121312311122 is an equidigital number, since it uses as much as digits as its factorization.

121312311122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60656155563.

The product of its digits is 144, while the sum is 20.

Adding to 121312311122 its reverse (221113213121), we get a palindrome (342425524243).

The spelling of 121312311122 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred eleven thousand, one hundred twenty-two".