121423040401 has 24 divisors (see below), whose sum is σ = 135836712960. Its totient is φ = 108376444800.

The previous prime is 121423040393. The next prime is 121423040443. The reversal of 121423040401 is 104040324121.

It is a happy number.

It is not a de Polignac number, because 121423040401 - 2³ = 121423040393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121423040801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6691621 + ... + 6709741.

It is an arithmetic number, because the mean of its divisors is an integer number (5659863040).

Almost surely, 2^121423040401 is an apocalyptic number.

It is an amenable number.

121423040401 is a deficient number, since it is larger than the sum of its proper divisors (14413672559).

121423040401 is a wasteful number, since it uses less digits than its factorization.

121423040401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19457 (or 19444 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 121423040401 its reverse (104040324121), we get a palindrome (225463364522).

The spelling of 121423040401 in words is "one hundred twenty-one billion, four hundred twenty-three million, forty thousand, four hundred one".