121111110202212 has 48 divisors (see below), whose sum is σ = 338144980055680. Its totient is φ = 37264956984864.

The previous prime is 121111110202189. The next prime is 121111110202219. The reversal of 121111110202212 is 212202011111121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121111110202219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43130735848 + ... + 43130738655.

Almost surely, 2^{121111110202212} is an apocalyptic number.

121111110202212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121111110202212 is an abundant number, since it is smaller than the sum of its proper divisors (217033869853468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121111110202212 is a wasteful number, since it uses less digits than its factorization.

121111110202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86261474529 (or 86261474521 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121111110202212 its reverse (212202011111121), we get a palindrome (333313121313333).

The spelling of 121111110202212 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred ten million, two hundred two thousand, two hundred twelve".