121234422421 has 32 divisors (see below), whose sum is σ = 149326882560. Its totient is φ = 96056908800.

The previous prime is 121234422409. The next prime is 121234422431. The reversal of 121234422421 is 124224432121.

It is not a de Polignac number, because 121234422421 - 2⁹ = 121234421909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121234422421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121234422431) 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, 8284491 + ... + 8299111.

It is an arithmetic number, because the mean of its divisors is an integer number (4666465080).

Almost surely, 2^121234422421 is an apocalyptic number.

It is an amenable number.

121234422421 is a deficient number, since it is larger than the sum of its proper divisors (28092460139).

121234422421 is a wasteful number, since it uses less digits than its factorization.

121234422421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15885.

The product of its digits is 6144, while the sum is 28.

Adding to 121234422421 its reverse (124224432121), we get a palindrome (245458854542).

The spelling of 121234422421 in words is "one hundred twenty-one billion, two hundred thirty-four million, four hundred twenty-two thousand, four hundred twenty-one".