1122122100 has 72 divisors (see below), whose sum is σ = 3541835808. Its totient is φ = 272028800.

The previous prime is 1122122087. The next prime is 1122122117. The reversal of 1122122100 is 12212211.

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 23 ways as a sum of consecutive naturals, for example, 166719 + ... + 173318.

It is an arithmetic number, because the mean of its divisors is an integer number (49192164).

Almost surely, 2^1122122100 is an apocalyptic number.

1122122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122122100 is an abundant number, since it is smaller than the sum of its proper divisors (2419713708).

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

1122122100 is a wasteful number, since it uses less digits than its factorization.

1122122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340065 (or 340058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1122122100 is about 33498.0909903833. The cubic root of 1122122100 is about 1039.1542989240.

Adding to 1122122100 its reverse (12212211), we get a palindrome (1134334311).

It can be divided in two parts, 112 and 2122100, that added together give a palindrome (2122212).

The spelling of 1122122100 in words is "one billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred".