121123431201 has 4 divisors (see below), whose sum is σ = 161497908272. Its totient is φ = 80748954132.

The previous prime is 121123431179. The next prime is 121123431203. The reversal of 121123431201 is 102134321121.

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 not a de Polignac number, because 121123431201 - 2⁶ = 121123431137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121123431203) 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, 20187238531 + ... + 20187238536.

It is an arithmetic number, because the mean of its divisors is an integer number (40374477068).

Almost surely, 2^121123431201 is an apocalyptic number.

It is an amenable number.

121123431201 is a deficient number, since it is larger than the sum of its proper divisors (40374477071).

121123431201 is an equidigital number, since it uses as much as digits as its factorization.

121123431201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40374477070.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121123431201 its reverse (102134321121), we get a palindrome (223257752322).

The spelling of 121123431201 in words is "one hundred twenty-one billion, one hundred twenty-three million, four hundred thirty-one thousand, two hundred one".