121201031331 has 24 divisors (see below), whose sum is σ = 184882617920. Its totient is φ = 76298644656.

The previous prime is 121201031323. The next prime is 121201031351. The reversal of 121201031331 is 133130102121.

121201031331 is a `hidden beast` number, since 121 + 201 + 0 + 313 + 31 = 666.

It is not a de Polignac number, because 121201031331 - 2³ = 121201031323 is a prime.

It is a super-2 number, since 2×121201031331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201031351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1101865 + ... + 1206858.

Almost surely, 2^121201031331 is an apocalyptic number.

121201031331 is a deficient number, since it is larger than the sum of its proper divisors (63681586589).

121201031331 is a wasteful number, since it uses less digits than its factorization.

121201031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309055 (or 2309052 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121201031331 its reverse (133130102121), we get a palindrome (254331133452).

The spelling of 121201031331 in words is "one hundred twenty-one billion, two hundred one million, thirty-one thousand, three hundred thirty-one".