121220122122 has 24 divisors (see below), whose sum is σ = 286520289120. Its totient is φ = 36733370280.

The previous prime is 121220122109. The next prime is 121220122141. The reversal of 121220122122 is 221221022121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121220122095 and 121220122104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306111222 + ... + 306111617.

It is an arithmetic number, because the mean of its divisors is an integer number (11938345380).

Almost surely, 2^121220122122 is an apocalyptic number.

121220122122 is an abundant number, since it is smaller than the sum of its proper divisors (165300166998).

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

121220122122 is a wasteful number, since it uses less digits than its factorization.

121220122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612222858 (or 612222855 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121220122122 its reverse (221221022121), we get a palindrome (342441144243).

It can be divided in two parts, 121220 and 122122, that added together give a palindrome (243342).

The spelling of 121220122122 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".