1123213136 has 20 divisors (see below), whose sum is σ = 2176765812. Its totient is φ = 561467136.

The previous prime is 1123213129. The next prime is 1123213183. The reversal of 1123213136 is 6313123211.

It can be written as a sum of positive squares in 2 ways, for example, as 208513600 + 914699536 = 14440^2 + 30244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95516 + ... + 106628.

Almost surely, 2^1123213136 is an apocalyptic number.

1123213136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1123213136 is a deficient number, since it is larger than the sum of its proper divisors (1053552676).

1123213136 is a wasteful number, since it uses less digits than its factorization.

1123213136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17438 (or 17432 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 1123213136 is about 33514.3720812430. The cubic root of 1123213136 is about 1039.4909787141.

Adding to 1123213136 its reverse (6313123211), we get a palindrome (7436336347).

The spelling of 1123213136 in words is "one billion, one hundred twenty-three million, two hundred thirteen thousand, one hundred thirty-six".