1131223100 has 36 divisors (see below), whose sum is σ = 2805435024. Its totient is φ = 387847680.

The previous prime is 1131223091. The next prime is 1131223103. The reversal of 1131223100 is 13221311.

It is a super-2 number, since 2×1131223100² = 2559331403947220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131223103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807317 + ... + 808716.

Almost surely, 2^1131223100 is an apocalyptic number.

1131223100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131223100 is an abundant number, since it is smaller than the sum of its proper divisors (1674211924).

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

1131223100 is a wasteful number, since it uses less digits than its factorization.

1131223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616054 (or 1616047 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131223100 is about 33633.6602230563. The cubic root of 1131223100 is about 1041.9561003360.

Adding to 1131223100 its reverse (13221311), we get a palindrome (1144444411).

The spelling of 1131223100 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred".