121312212 has 48 divisors (see below), whose sum is σ = 337569792. Its totient is φ = 33153120.

The previous prime is 121312199. The next prime is 121312229. The reversal of 121312212 is 212213121.

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 = 121312191 and 121312200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29464 + ... + 33327.

It is an arithmetic number, because the mean of its divisors is an integer number (7032704).

Almost surely, 2^121312212 is an apocalyptic number.

121312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121312212 is an abundant number, since it is smaller than the sum of its proper divisors (216257580).

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

121312212 is a wasteful number, since it uses less digits than its factorization.

121312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62828 (or 62826 counting only the distinct ones).

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

The square root of 121312212 is about 11014.1823119104. The cubic root of 121312212 is about 495.0337860828.

Adding to 121312212 its reverse (212213121), we get a palindrome (333525333).

Subtracting 121312212 from its reverse (212213121), we obtain a palindrome (90900909).

The spelling of 121312212 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred twelve".