121122111222 has 48 divisors (see below), whose sum is σ = 303291349920. Its totient is φ = 34217479296.

The previous prime is 121122111217. The next prime is 121122111233. The reversal of 121122111222 is 222111221121.

121122111222 is a `hidden beast` number, since 1 + 211 + 221 + 11 + 222 = 666.

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 = 121122111195 and 121122111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5389273 + ... + 5411700.

It is an arithmetic number, because the mean of its divisors is an integer number (6318569790).

Almost surely, 2^121122111222 is an apocalyptic number.

121122111222 is an abundant number, since it is smaller than the sum of its proper divisors (182169238698).

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

121122111222 is a wasteful number, since it uses less digits than its factorization.

121122111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801077 (or 10801074 counting only the distinct ones).

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

Adding to 121122111222 its reverse (222111221121), we get a palindrome (343233332343).

The spelling of 121122111222 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-two".