1111012121100 has 72 divisors (see below), whose sum is σ = 3673746754048. Its totient is φ = 253945627200.

The previous prime is 1111012121099. The next prime is 1111012121183. The reversal of 1111012121100 is 11212101111.

It is a super-2 number, since 2×1111012121100² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264524596 + ... + 264528795.

Almost surely, 2^{1111012121100} is an apocalyptic number.

1111012121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111012121100 is an abundant number, since it is smaller than the sum of its proper divisors (2562734632948).

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

1111012121100 is a wasteful number, since it uses less digits than its factorization.

1111012121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529053415 (or 529053408 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111012121100 its reverse (11212101111), we get a palindrome (1122224222211).

The spelling of 1111012121100 in words is "one trillion, one hundred eleven billion, twelve million, one hundred twenty-one thousand, one hundred".