121121112188 has 12 divisors (see below), whose sum is σ = 217131750192. Its totient is φ = 59083469280.

The previous prime is 121121112187. The next prime is 121121112191. The reversal of 121121112188 is 881211121121.

It is a self number, because there is not a number n which added to its sum of digits gives 121121112188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121112187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369271520 + ... + 369271847.

It is an arithmetic number, because the mean of its divisors is an integer number (18094312516).

Almost surely, 2^121121112188 is an apocalyptic number.

It is an amenable number.

121121112188 is a deficient number, since it is larger than the sum of its proper divisors (96010638004).

121121112188 is a wasteful number, since it uses less digits than its factorization.

121121112188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738543412 (or 738543410 counting only the distinct ones).

The product of its digits is 512, while the sum is 29.

The spelling of 121121112188 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eighty-eight".