121421424404 has 24 divisors (see below), whose sum is σ = 242892793920. Its totient is φ = 52027050816.

The previous prime is 121421424389. The next prime is 121421424479. The reversal of 121421424404 is 404424124121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306602 + ... + 580385.

It is an arithmetic number, because the mean of its divisors is an integer number (10120533080).

Almost surely, 2^121421424404 is an apocalyptic number.

121421424404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121421424404 is an abundant number, since it is smaller than the sum of its proper divisors (121471369516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121421424404 is a wasteful number, since it uses less digits than its factorization.

121421424404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891887 (or 891885 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 121421424404 its reverse (404424124121), we get a palindrome (525845548525).

The spelling of 121421424404 in words is "one hundred twenty-one billion, four hundred twenty-one million, four hundred twenty-four thousand, four hundred four".