121212012 has 24 divisors (see below), whose sum is σ = 289406656. Its totient is φ = 39464208.

The previous prime is 121211999. The next prime is 121212017. The reversal of 121212012 is 210212121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (121212017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116938 + ... + 117969.

Almost surely, 2^121212012 is an apocalyptic number.

121212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121212012 is an abundant number, since it is smaller than the sum of its proper divisors (168194644).

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

121212012 is a wasteful number, since it uses less digits than its factorization.

121212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234957 (or 234955 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121212012 is about 11009.6326914207. The cubic root of 121212012 is about 494.8974545257.

Adding to 121212012 its reverse (210212121), we get a palindrome (331424133).

The spelling of 121212012 in words is "one hundred twenty-one million, two hundred twelve thousand, twelve".