121211312 has 40 divisors (see below), whose sum is σ = 239730192. Its totient is φ = 59360000.

The previous prime is 121211273. The next prime is 121211323. The reversal of 121211312 is 213112121.

It is a super-2 number, since 2×121211312² = 29384364313522688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172562 + ... + 173262.

Almost surely, 2^121211312 is an apocalyptic number.

It is an amenable number.

121211312 is a deficient number, since it is larger than the sum of its proper divisors (118518880).

121211312 is a wasteful number, since it uses less digits than its factorization.

121211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 911 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 121211312 is about 11009.6009010318. The cubic root of 121211312 is about 494.8965018454.

Adding to 121211312 its reverse (213112121), we get a palindrome (334323433).

The spelling of 121211312 in words is "one hundred twenty-one million, two hundred eleven thousand, three hundred twelve".