121404223421 has 16 divisors (see below), whose sum is σ = 132376204800. Its totient is φ = 110666740800.

The previous prime is 121404223387. The next prime is 121404223429. The reversal of 121404223421 is 124322404121.

It is a cyclic number.

It is not a de Polignac number, because 121404223421 - 2⁶ = 121404223357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404223429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2565071 + ... + 2611971.

It is an arithmetic number, because the mean of its divisors is an integer number (8273512800).

Almost surely, 2^121404223421 is an apocalyptic number.

It is an amenable number.

121404223421 is a deficient number, since it is larger than the sum of its proper divisors (10971981379).

121404223421 is a wasteful number, since it uses less digits than its factorization.

121404223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49396.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 121404223421 its reverse (124322404121), we get a palindrome (245726627542).

The spelling of 121404223421 in words is "one hundred twenty-one billion, four hundred four million, two hundred twenty-three thousand, four hundred twenty-one".