121323040421 has 32 divisors (see below), whose sum is σ = 135610675200. Its totient is φ = 107609256000.

The previous prime is 121323040387. The next prime is 121323040459. The reversal of 121323040421 is 124040323121.

It is a cyclic number.

It is not a de Polignac number, because 121323040421 - 2²⁶ = 121255931557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323040121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98555876 + ... + 98557106.

It is an arithmetic number, because the mean of its divisors is an integer number (4237833600).

Almost surely, 2^121323040421 is an apocalyptic number.

121323040421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121323040421 is a deficient number, since it is larger than the sum of its proper divisors (14287634779).

121323040421 is a wasteful number, since it uses less digits than its factorization.

121323040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121323040421 its reverse (124040323121), we get a palindrome (245363363542).

The spelling of 121323040421 in words is "one hundred twenty-one billion, three hundred twenty-three million, forty thousand, four hundred twenty-one".