121211212122012 has 48 divisors (see below), whose sum is σ = 286052498434080. Its totient is φ = 39942986130432.

The previous prime is 121211212121971. The next prime is 121211212122023. The reversal of 121211212122012 is 210221212112121.

It is a self number, because there is not a number n which added to its sum of digits gives 121211212122012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3325003 + ... + 15920994.

It is an arithmetic number, because the mean of its divisors is an integer number (5959427050710).

Almost surely, 2^{121211212122012} is an apocalyptic number.

121211212122012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121211212122012 is an abundant number, since it is smaller than the sum of its proper divisors (164841286312068).

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

121211212122012 is a wasteful number, since it uses less digits than its factorization.

121211212122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19251990 (or 19251988 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121211212122012 its reverse (210221212112121), we get a palindrome (331432424234133).

The spelling of 121211212122012 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, twelve".