1100138612 has 60 divisors (see below), whose sum is σ = 2124459540. Its totient is φ = 498060288.

The previous prime is 1100138591. The next prime is 1100138621. The reversal of 1100138612 is 2168310011.

It can be written as a sum of positive squares in 10 ways, for example, as 19307236 + 1080831376 = 4394^2 + 32876^2 .

It is a super-2 number, since 2×1100138612² = 2420609931226573088, 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 19 ways as a sum of consecutive naturals, for example, 12361064 + ... + 12361152.

It is an arithmetic number, because the mean of its divisors is an integer number (35407659).

Almost surely, 2^1100138612 is an apocalyptic number.

It is an amenable number.

1100138612 is a deficient number, since it is larger than the sum of its proper divisors (1024320928).

1100138612 is an frugal number, since it uses more digits than its factorization.

1100138612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1100138612 is about 33168.3374922531. The cubic root of 1100138612 is about 1032.3234731538.

Adding to 1100138612 its reverse (2168310011), we get a palindrome (3268448623).

The spelling of 1100138612 in words is "one billion, one hundred million, one hundred thirty-eight thousand, six hundred twelve".