1122123100 has 144 divisors (see below), whose sum is σ = 2904814080. Its totient is φ = 368121600.

The previous prime is 1122123061. The next prime is 1122123127. The reversal of 1122123100 is 13212211.

It is a super-2 number, since 2×1122123100² = 2518320503107220000, which contains 22 as substring.

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, 3389935 + ... + 3390265.

It is an arithmetic number, because the mean of its divisors is an integer number (20172320).

Almost surely, 2^1122123100 is an apocalyptic number.

1122123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452407040).

1122123100 is an abundant number, since it is smaller than the sum of its proper divisors (1782690980).

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

1122123100 is a wasteful number, since it uses less digits than its factorization.

1122123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1122123100 is about 33498.1059166037. The cubic root of 1122123100 is about 1039.1546076112.

Adding to 1122123100 its reverse (13212211), we get a palindrome (1135335311).

It can be divided in two parts, 112 and 2123100, that added together give a palindrome (2123212).

The spelling of 1122123100 in words is "one billion, one hundred twenty-two million, one hundred twenty-three thousand, one hundred".