11121642736 has 20 divisors (see below), whose sum is σ = 21661006464. Its totient is φ = 5531705600.

The previous prime is 11121642667. The next prime is 11121642737. The reversal of 11121642736 is 63724612111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121642737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816585 + ... + 1822696.

Almost surely, 2^11121642736 is an apocalyptic number.

11121642736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11121642736 is a deficient number, since it is larger than the sum of its proper divisors (10539363728).

11121642736 is a wasteful number, since it uses less digits than its factorization.

11121642736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639480 (or 3639474 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The spelling of 11121642736 in words is "eleven billion, one hundred twenty-one million, six hundred forty-two thousand, seven hundred thirty-six".