121112221121012 has 48 divisors (see below), whose sum is σ = 250508451961152. Its totient is φ = 50607768046080.

The previous prime is 121112221120937. The next prime is 121112221121041. The reversal of 121112221121012 is 210121122211121.

It is a happy number.

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, 1882697303 + ... + 1882761630.

It is an arithmetic number, because the mean of its divisors is an integer number (5218926082524).

Almost surely, 2^{121112221121012} is an apocalyptic number.

It is an amenable number.

121112221121012 is an abundant number, since it is smaller than the sum of its proper divisors (129396230840140).

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

121112221121012 is a wasteful number, since it uses less digits than its factorization.

121112221121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765459008 (or 3765459006 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121112221121012 its reverse (210121122211121), we get a palindrome (331233343332133).

The spelling of 121112221121012 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".