121212303224 has 8 divisors (see below), whose sum is σ = 227273068560. Its totient is φ = 60606151608.

The previous prime is 121212303193. The next prime is 121212303227. The reversal of 121212303224 is 422303212121.

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 121212303224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212303227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7575768944 + ... + 7575768959.

It is an arithmetic number, because the mean of its divisors is an integer number (28409133570).

Almost surely, 2^121212303224 is an apocalyptic number.

It is an amenable number.

121212303224 is a deficient number, since it is larger than the sum of its proper divisors (106060765336).

121212303224 is a wasteful number, since it uses less digits than its factorization.

121212303224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15151537909 (or 15151537905 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121212303224 its reverse (422303212121), we get a palindrome (543515515345).

The spelling of 121212303224 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred three thousand, two hundred twenty-four".