121220321310331 has 16 divisors (see below), whose sum is σ = 125202411579168. Its totient is φ = 117288183750400.

The previous prime is 121220321310269. The next prime is 121220321310359. The reversal of 121220321310331 is 133013123022121.

It is a cyclic number.

It is not a de Polignac number, because 121220321310331 - 2⁷ = 121220321310203 is a prime.

It is a super-2 number, since 2×121220321310331² (a number of 29 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 = 121220321310296 and 121220321310305.

It is not an unprimeable number, because it can be changed into a prime (121220321310391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667325 + ... + 15659521.

It is an arithmetic number, because the mean of its divisors is an integer number (7825150723698).

Almost surely, 2^{121220321310331} is an apocalyptic number.

121220321310331 is a deficient number, since it is larger than the sum of its proper divisors (3982090268837).

121220321310331 is a wasteful number, since it uses less digits than its factorization.

121220321310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993982.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 121220321310331 its reverse (133013123022121), we get a palindrome (254233444332452).

The spelling of 121220321310331 in words is "one hundred twenty-one trillion, two hundred twenty billion, three hundred twenty-one million, three hundred ten thousand, three hundred thirty-one".