121212111202012 has 6 divisors (see below), whose sum is σ = 212121194603528. Its totient is φ = 60606055601004.

The previous prime is 121212111201953. The next prime is 121212111202019. The reversal of 121212111202012 is 210202111212121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212111202019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151513900248 + ... + 15151513900255.

Almost surely, 2^{121212111202012} is an apocalyptic number.

It is an amenable number.

121212111202012 is a deficient number, since it is larger than the sum of its proper divisors (90909083401516).

121212111202012 is a wasteful number, since it uses less digits than its factorization.

121212111202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30303027800507 (or 30303027800505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121212111202012 its reverse (210202111212121), we get a palindrome (331414222414133).

The spelling of 121212111202012 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred eleven million, two hundred two thousand, twelve".