121220310203131 has 16 divisors (see below), whose sum is σ = 122200595308800. Its totient is φ = 120243456194400.

The previous prime is 121220310203011. The next prime is 121220310203141. The reversal of 121220310203131 is 131302013022121.

It is a cyclic number.

It is not a de Polignac number, because 121220310203131 - 2¹¹ = 121220310201083 is a prime.

It is a super-2 number, since 2×121220310203131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220310203141) 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, 718765186 + ... + 718933816.

It is an arithmetic number, because the mean of its divisors is an integer number (7637537206800).

Almost surely, 2^{121220310203131} is an apocalyptic number.

121220310203131 is a deficient number, since it is larger than the sum of its proper divisors (980285105669).

121220310203131 is a wasteful number, since it uses less digits than its factorization.

121220310203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178770.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 121220310203131 its reverse (131302013022121), we get a palindrome (252522323225252).

The spelling of 121220310203131 in words is "one hundred twenty-one trillion, two hundred twenty billion, three hundred ten million, two hundred three thousand, one hundred thirty-one".