121210331212 has 6 divisors (see below), whose sum is σ = 212118079628. Its totient is φ = 60605165604.

The previous prime is 121210331201. The next prime is 121210331213. The reversal of 121210331212 is 212133012121.

It is a self number, because there is not a number n which added to its sum of digits gives 121210331212.

It is not an unprimeable number, because it can be changed into a prime (121210331213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151291398 + ... + 15151291405.

Almost surely, 2^121210331212 is an apocalyptic number.

It is an amenable number.

121210331212 is a deficient number, since it is larger than the sum of its proper divisors (90907748416).

121210331212 is a wasteful number, since it uses less digits than its factorization.

121210331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302582807 (or 30302582805 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121210331212 its reverse (212133012121), we get a palindrome (333343343333).

The spelling of 121210331212 in words is "one hundred twenty-one billion, two hundred ten million, three hundred thirty-one thousand, two hundred twelve".