121342432121 has 4 divisors (see below), whose sum is σ = 121344159744. Its totient is φ = 121340704500.

The previous prime is 121342432117. The next prime is 121342432151. The reversal of 121342432121 is 121234243121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121342432121 - 2² = 121342432117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121342432151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753785 + ... + 900486.

It is an arithmetic number, because the mean of its divisors is an integer number (30336039936).

Almost surely, 2^121342432121 is an apocalyptic number.

It is an amenable number.

121342432121 is a deficient number, since it is larger than the sum of its proper divisors (1727623).

121342432121 is an equidigital number, since it uses as much as digits as its factorization.

121342432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727622.

The product of its digits is 2304, while the sum is 26.

Adding to 121342432121 its reverse (121234243121), we get a palindrome (242576675242).

The spelling of 121342432121 in words is "one hundred twenty-one billion, three hundred forty-two million, four hundred thirty-two thousand, one hundred twenty-one".