11503531112 has 8 divisors (see below), whose sum is σ = 21569120850. Its totient is φ = 5751765552.

The previous prime is 11503531099. The next prime is 11503531129. The reversal of 11503531112 is 21113530511.

It can be written as a sum of positive squares in only one way, i.e., 7149378916 + 4354152196 = 84554^2 + 65986^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718970687 + ... + 718970702.

Almost surely, 2^11503531112 is an apocalyptic number.

It is an amenable number.

11503531112 is a deficient number, since it is larger than the sum of its proper divisors (10065589738).

11503531112 is a wasteful number, since it uses less digits than its factorization.

11503531112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437941395 (or 1437941391 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The spelling of 11503531112 in words is "eleven billion, five hundred three million, five hundred thirty-one thousand, one hundred twelve".