121223112 has 16 divisors (see below), whose sum is σ = 303057840. Its totient is φ = 40407696.

The previous prime is 121223083. The next prime is 121223117. The reversal of 121223112 is 211322121.

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 = 121223091 and 121223100.

It is not an unprimeable number, because it can be changed into a prime (121223117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525458 + ... + 2525505.

It is an arithmetic number, because the mean of its divisors is an integer number (18941115).

Almost surely, 2^121223112 is an apocalyptic number.

121223112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121223112 is an abundant number, since it is smaller than the sum of its proper divisors (181834728).

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

121223112 is a wasteful number, since it uses less digits than its factorization.

121223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050972 (or 5050968 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 121223112 is about 11010.1367838915. The cubic root of 121223112 is about 494.9125608230.

Adding to 121223112 its reverse (211322121), we get a palindrome (332545233).

Subtracting 121223112 from its reverse (211322121), we obtain a palindrome (90099009).

The spelling of 121223112 in words is "one hundred twenty-one million, two hundred twenty-three thousand, one hundred twelve".