121111110011100 has 144 divisors (see below), whose sum is σ = 386055563112576. Its totient is φ = 29069573280000.

The previous prime is 121111110011081. The next prime is 121111110011167. The reversal of 121111110011100 is 1110011111121.

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 47 ways as a sum of consecutive naturals, for example, 181351534 + ... + 182018133.

It is an arithmetic number, because the mean of its divisors is an integer number (2680941410504).

Almost surely, 2^{121111110011100} is an apocalyptic number.

121111110011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111110011100 is an abundant number, since it is smaller than the sum of its proper divisors (264944453101476).

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

121111110011100 is a wasteful number, since it uses less digits than its factorization.

121111110011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363369796 (or 363369789 counting only the distinct ones).

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

Adding to 121111110011100 its reverse (1110011111121), we get a palindrome (122221121122221).

It can be divided in two parts, 1211111 and 10011100, that added together give a palindrome (11222211).

The spelling of 121111110011100 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred ten million, eleven thousand, one hundred".