11012511321603 has 32 divisors (see below), whose sum is σ = 17798291769600. Its totient is φ = 6674139158400.

The previous prime is 11012511321563. The next prime is 11012511321697. The reversal of 11012511321603 is 30612311521011.

11012511321603 is a `hidden beast` number, since 1 + 1 + 0 + 1 + 2 + 51 + 1 + 3 + 2 + 1 + 603 = 666.

It is not a de Polignac number, because 11012511321603 - 2¹⁴ = 11012511305219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11012511321103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19986268 + ... + 20529878.

It is an arithmetic number, because the mean of its divisors is an integer number (556196617800).

Almost surely, 2^{11012511321603} is an apocalyptic number.

11012511321603 is a deficient number, since it is larger than the sum of its proper divisors (6785780447997).

11012511321603 is a wasteful number, since it uses less digits than its factorization.

11012511321603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611840 (or 611834 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 11012511321603 its reverse (30612311521011), we get a palindrome (41624822842614).

The spelling of 11012511321603 in words is "eleven trillion, twelve billion, five hundred eleven million, three hundred twenty-one thousand, six hundred three".