121111212204 has 48 divisors (see below), whose sum is σ = 314241782400. Its totient is φ = 40338293328.

The previous prime is 121111212197. The next prime is 121111212281. The reversal of 121111212204 is 402212111121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309382 + ... + 581325.

It is an arithmetic number, because the mean of its divisors is an integer number (6546703800).

Almost surely, 2^121111212204 is an apocalyptic number.

It is an amenable number.

121111212204 is an abundant number, since it is smaller than the sum of its proper divisors (193130570196).

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

121111212204 is a wasteful number, since it uses less digits than its factorization.

121111212204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891979 (or 891971 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121111212204 its reverse (402212111121), we get a palindrome (523323323325).

The spelling of 121111212204 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, two hundred four".