11111111101012 has 12 divisors (see below), whose sum is σ = 20940170921236. Its totient is φ = 5128205123520.

The previous prime is 11111111101003. The next prime is 11111111101099. The reversal of 11111111101012 is 21010111111111.

It can be written as a sum of positive squares in 2 ways, for example, as 7144266111376 + 3966844989636 = 2672876^2 + 1991694^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 11111111100983 and 11111111101001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106837606689 + ... + 106837606792.

Almost surely, 2^{11111111101012} is an apocalyptic number.

It is an amenable number.

11111111101012 is a deficient number, since it is larger than the sum of its proper divisors (9829059820224).

11111111101012 is a wasteful number, since it uses less digits than its factorization.

11111111101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213675213498 (or 213675213496 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 11111111101012 its reverse (21010111111111), we get a palindrome (32121222212123).

The spelling of 11111111101012 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, twelve".