121213321331 has 4 divisors (see below), whose sum is σ = 121393430952. Its totient is φ = 121033211712.

The previous prime is 121213321319. The next prime is 121213321423. The reversal of 121213321331 is 133123312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133123312121 = 31 ⋅4294300391.

It is a cyclic number.

It is not a de Polignac number, because 121213321331 - 2²² = 121209127027 is a prime.

It is a super-2 number, since 2×121213321331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121213321297 and 121213321306.

It is not an unprimeable number, because it can be changed into a prime (121213321301) 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, 90053801 + ... + 90055146.

It is an arithmetic number, because the mean of its divisors is an integer number (30348357738).

Almost surely, 2^121213321331 is an apocalyptic number.

121213321331 is a deficient number, since it is larger than the sum of its proper divisors (180109621).

121213321331 is an equidigital number, since it uses as much as digits as its factorization.

121213321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180109620.

The product of its digits is 648, while the sum is 23.

Adding to 121213321331 its reverse (133123312121), we get a palindrome (254336633452).

The spelling of 121213321331 in words is "one hundred twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, three hundred thirty-one".