121431021201 has 48 divisors (see below), whose sum is σ = 211107911040. Its totient is φ = 65705955840.

The previous prime is 121431021193. The next prime is 121431021211. The reversal of 121431021201 is 102120134121.

121431021201 is a `hidden beast` number, since 1 + 21 + 431 + 0 + 212 + 0 + 1 = 666.

It is not a de Polignac number, because 121431021201 - 2³ = 121431021193 is a prime.

It is a super-2 number, since 2×121431021201² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121431021211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2626041 + ... + 2671881.

It is an arithmetic number, because the mean of its divisors is an integer number (4398081480).

Almost surely, 2^121431021201 is an apocalyptic number.

It is an amenable number.

121431021201 is a deficient number, since it is larger than the sum of its proper divisors (89676889839).

121431021201 is a wasteful number, since it uses less digits than its factorization.

121431021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48086 (or 48083 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121431021201 its reverse (102120134121), we get a palindrome (223551155322).

The spelling of 121431021201 in words is "one hundred twenty-one billion, four hundred thirty-one million, twenty-one thousand, two hundred one".