121000000122 has 80 divisors (see below), whose sum is σ = 289144658880. Its totient is φ = 37687565952.

The previous prime is 121000000111. The next prime is 121000000127. The reversal of 121000000122 is 221000000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121000000127) 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 39 ways as a sum of consecutive naturals, for example, 224763 + ... + 540849.

It is an arithmetic number, because the mean of its divisors is an integer number (3614308236).

Almost surely, 2^121000000122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121000000122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144572329440).

121000000122 is an abundant number, since it is smaller than the sum of its proper divisors (168144658758).

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

121000000122 is a wasteful number, since it uses less digits than its factorization.

121000000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316257 (or 316248 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000000122 its reverse (221000000121), we get a palindrome (342000000243).

Subtracting 121000000122 from its reverse (221000000121), we obtain a palindrome (99999999999).

The spelling of 121000000122 in words is "one hundred twenty-one billion, one hundred twenty-two", and thus it is an aban number.