121224012 has 96 divisors (see below), whose sum is σ = 359460864. Its totient is φ = 30931200.

The previous prime is 121224001. The next prime is 121224013. The reversal of 121224012 is 210422121.

It is a super-2 number, since 2×121224012² = 29390522170752288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121223982 and 121224000.

It is not an unprimeable number, because it can be changed into a prime (121224013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32062 + ... + 35642.

It is an arithmetic number, because the mean of its divisors is an integer number (3744384).

Almost surely, 2^121224012 is an apocalyptic number.

121224012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121224012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179730432).

121224012 is an abundant number, since it is smaller than the sum of its proper divisors (238236852).

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

121224012 is a wasteful number, since it uses less digits than its factorization.

121224012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639 (or 3637 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121224012 is about 11010.1776552424. The cubic root of 121224012 is about 494.9137856175.

Adding to 121224012 its reverse (210422121), we get a palindrome (331646133).

The spelling of 121224012 in words is "one hundred twenty-one million, two hundred twenty-four thousand, twelve".