121102222122 has 112 divisors (see below), whose sum is σ = 312378420672. Its totient is φ = 34476684480.

The previous prime is 121102222103. The next prime is 121102222123. The reversal of 121102222122 is 221222201121.

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 = 121102222095 and 121102222104.

It is not an unprimeable number, because it can be changed into a prime (121102222123) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2846773 + ... + 2888999.

Almost surely, 2^121102222122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121102222122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156189210336).

121102222122 is an abundant number, since it is smaller than the sum of its proper divisors (191276198550).

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

121102222122 is an equidigital number, since it uses as much as digits as its factorization.

121102222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42535 (or 42520 counting only the distinct ones).

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

Adding to 121102222122 its reverse (221222201121), we get a palindrome (342324423243).

The spelling of 121102222122 in words is "one hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-two".