121112121222 has 24 divisors (see below), whose sum is σ = 262676582064. Its totient is φ = 40329632304.

The previous prime is 121112121209. The next prime is 121112121227. The reversal of 121112121222 is 222121211121.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121112121195 and 121112121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112121227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3404713 + ... + 3440100.

It is an arithmetic number, because the mean of its divisors is an integer number (10944857586).

Almost surely, 2^121112121222 is an apocalyptic number.

121112121222 is an abundant number, since it is smaller than the sum of its proper divisors (141564460842).

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

121112121222 is a wasteful number, since it uses less digits than its factorization.

121112121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845804 (or 6845801 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 121112121222 its reverse (222121211121), we get a palindrome (343233332343).

The spelling of 121112121222 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".