1101123640 has 32 divisors (see below), whose sum is σ = 2478556080. Its totient is φ = 440266752.

The previous prime is 1101123631. The next prime is 1101123659. The reversal of 1101123640 is 463211011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134299 + ... + 142261.

Almost surely, 2^1101123640 is an apocalyptic number.

1101123640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101123640 is an abundant number, since it is smaller than the sum of its proper divisors (1377432440).

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

1101123640 is a wasteful number, since it uses less digits than its factorization.

1101123640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11431 (or 11427 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1101123640 is about 33183.1830902341. The cubic root of 1101123640 is about 1032.6314840947.

Adding to 1101123640 its reverse (463211011), we get a palindrome (1564334651).

The spelling of 1101123640 in words is "one billion, one hundred one million, one hundred twenty-three thousand, six hundred forty".