1122111122100 has 72 divisors (see below), whose sum is σ = 3254738225088. Its totient is φ = 298483392000.

The previous prime is 1122111122089. The next prime is 1122111122129. The reversal of 1122111122100 is 12211112211.

It is a happy number.

It is a super-2 number, since 2×1122111122100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1122111122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4543504 + ... + 4784103.

Almost surely, 2^{1122111122100} is an apocalyptic number.

1122111122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122111122100 is an abundant number, since it is smaller than the sum of its proper divisors (2132627102988).

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

1122111122100 is a wasteful number, since it uses less digits than its factorization.

1122111122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328025 (or 9328018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1122111122100 its reverse (12211112211), we get a palindrome (1134322234311).

The spelling of 1122111122100 in words is "one trillion, one hundred twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred".