1122111100 has 36 divisors (see below), whose sum is σ = 2656345608. Its totient is φ = 408040000.

The previous prime is 1122111079. The next prime is 1122111119. The reversal of 1122111100 is 11112211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508951 + ... + 511150.

It is an arithmetic number, because the mean of its divisors is an integer number (73787378).

Almost surely, 2^1122111100 is an apocalyptic number.

1122111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122111100 is an abundant number, since it is smaller than the sum of its proper divisors (1534234508).

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

1122111100 is a wasteful number, since it uses less digits than its factorization.

1122111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020126 (or 1020119 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1122111100 is about 33497.9268015201. The cubic root of 1122111100 is about 1039.1509033534.

Adding to 1122111100 its reverse (11112211), we get a palindrome (1133223311).

It can be divided in two parts, 1122111 and 100, that added together give a palindrome (1122211).

The spelling of 1122111100 in words is "one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred".