11155511012 has 6 divisors (see below), whose sum is σ = 19522144278. Its totient is φ = 5577755504.

The previous prime is 11155511009. The next prime is 11155511051. The reversal of 11155511012 is 21011555111.

It can be written as a sum of positive squares in only one way, i.e., 8660908096 + 2494602916 = 93064^2 + 49946^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394438873 + ... + 1394438880.

It is an arithmetic number, because the mean of its divisors is an integer number (3253690713).

Almost surely, 2^11155511012 is an apocalyptic number.

It is an amenable number.

11155511012 is a deficient number, since it is larger than the sum of its proper divisors (8366633266).

11155511012 is a wasteful number, since it uses less digits than its factorization.

11155511012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788877757 (or 2788877755 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 23.

The spelling of 11155511012 in words is "eleven billion, one hundred fifty-five million, five hundred eleven thousand, twelve".