121422203112 has 128 divisors (see below), whose sum is σ = 367926451200. Its totient is φ = 32598125568.

The previous prime is 121422203099. The next prime is 121422203141. The reversal of 121422203112 is 211302224121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1733523 + ... + 1802205.

It is an arithmetic number, because the mean of its divisors is an integer number (2874425400).

Almost surely, 2^121422203112 is an apocalyptic number.

121422203112 is a gapful number since it is divisible by the number (12) 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 121422203112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183963225600).

121422203112 is an abundant number, since it is smaller than the sum of its proper divisors (246504248088).

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

121422203112 is a wasteful number, since it uses less digits than its factorization.

121422203112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69335 (or 69331 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121422203112 its reverse (211302224121), we get a palindrome (332724427233).

The spelling of 121422203112 in words is "one hundred twenty-one billion, four hundred twenty-two million, two hundred three thousand, one hundred twelve".