121213112 has 8 divisors (see below), whose sum is σ = 227274600. Its totient is φ = 60606552.

The previous prime is 121213063. The next prime is 121213129. The reversal of 121213112 is 211312121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 7575812 + ... + 7575827.

It is an arithmetic number, because the mean of its divisors is an integer number (28409325).

Almost surely, 2^121213112 is an apocalyptic number.

It is an amenable number.

121213112 is a deficient number, since it is larger than the sum of its proper divisors (106061488).

121213112 is a wasteful number, since it uses less digits than its factorization.

121213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151645 (or 15151641 counting only the distinct ones).

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

The square root of 121213112 is about 11009.6826475607. The cubic root of 121213112 is about 494.8989515873.

Adding to 121213112 its reverse (211312121), we get a palindrome (332525233).

Subtracting 121213112 from its reverse (211312121), we obtain a palindrome (90099009).

The spelling of 121213112 in words is "one hundred twenty-one million, two hundred thirteen thousand, one hundred twelve".