121323401240121 has 12 divisors (see below), whose sum is σ = 176361122540772. Its totient is φ = 80367093814176.

The previous prime is 121323401240113. The next prime is 121323401240137. The reversal of 121323401240121 is 121042104323121.

121323401240121 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 2 + 3 + 401 + 240 + 12 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62845874596521 + 58477526643600 = 7927539^2 + 7647060^2 .

It is not a de Polignac number, because 121323401240121 - 2³ = 121323401240113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121323401248121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42931138446 + ... + 42931141271.

It is an arithmetic number, because the mean of its divisors is an integer number (14696760211731).

Almost surely, 2^{121323401240121} is an apocalyptic number.

It is an amenable number.

121323401240121 is a deficient number, since it is larger than the sum of its proper divisors (55037721300651).

121323401240121 is a wasteful number, since it uses less digits than its factorization.

121323401240121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85862279880 (or 85862279877 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 121323401240121 its reverse (121042104323121), we get a palindrome (242365505563242).

The spelling of 121323401240121 in words is "one hundred twenty-one trillion, three hundred twenty-three billion, four hundred one million, two hundred forty thousand, one hundred twenty-one".