121001111111100 has 288 divisors, whose sum is σ = 415319051379456. Its totient is φ = 26861931417600.

The previous prime is 121001111111011. The next prime is 121001111111123. The reversal of 121001111111100 is 1111111100121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27071362 + ... + 31222761.

It is an arithmetic number, because the mean of its divisors is an integer number (1442080039512).

Almost surely, 2^{121001111111100} is an apocalyptic number.

121001111111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001111111100 is an abundant number, since it is smaller than the sum of its proper divisors (294317940268356).

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

121001111111100 is a wasteful number, since it uses less digits than its factorization.

121001111111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58294205 (or 58294198 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 121001111111100 its reverse (1111111100121), we get a palindrome (122112222211221).

The spelling of 121001111111100 in words is "one hundred twenty-one trillion, one billion, one hundred eleven million, one hundred eleven thousand, one hundred".