121201012331 has 16 divisors (see below), whose sum is σ = 146854713600. Its totient is φ = 97710802848.

The previous prime is 121201012327. The next prime is 121201012333. The reversal of 121201012331 is 133210102121.

It is a cyclic number.

It is not a de Polignac number, because 121201012331 - 2² = 121201012327 is a prime.

It is a super-2 number, since 2×121201012331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121201012333) 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, 3259520 + ... + 3296493.

It is an arithmetic number, because the mean of its divisors is an integer number (9178419600).

Almost surely, 2^121201012331 is an apocalyptic number.

121201012331 is a deficient number, since it is larger than the sum of its proper divisors (25653701269).

121201012331 is a wasteful number, since it uses less digits than its factorization.

121201012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556178.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121201012331 its reverse (133210102121), we get a palindrome (254411114452).

The spelling of 121201012331 in words is "one hundred twenty-one billion, two hundred one million, twelve thousand, three hundred thirty-one".