121422400 has 84 divisors (see below), whose sum is σ = 325983600. Its totient is φ = 44147200.

The previous prime is 121422373. The next prime is 121422401. The reversal of 121422400 is 4224121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (121422401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14151 + ... + 21049.

Almost surely, 2^121422400 is an apocalyptic number.

121422400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121422400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162991800).

121422400 is an abundant number, since it is smaller than the sum of its proper divisors (204561200).

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

121422400 is a wasteful number, since it uses less digits than its factorization.

121422400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932 (or 6917 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 121422400 is about 11019.1832728202. The cubic root of 121422400 is about 495.1836206166.

Adding to 121422400 its reverse (4224121), we get a palindrome (125646521).

The spelling of 121422400 in words is "one hundred twenty-one million, four hundred twenty-two thousand, four hundred".