121223200312 has 8 divisors (see below), whose sum is σ = 227293500600. Its totient is φ = 60611600152.

The previous prime is 121223200297. The next prime is 121223200361. The reversal of 121223200312 is 213002322121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121223200312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7576450012 + ... + 7576450027.

It is an arithmetic number, because the mean of its divisors is an integer number (28411687575).

Almost surely, 2^121223200312 is an apocalyptic number.

It is an amenable number.

121223200312 is a deficient number, since it is larger than the sum of its proper divisors (106070300288).

121223200312 is a wasteful number, since it uses less digits than its factorization.

121223200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15152900045 (or 15152900041 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121223200312 its reverse (213002322121), we get a palindrome (334225522433).

The spelling of 121223200312 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred thousand, three hundred twelve".