11100121012 has 12 divisors (see below), whose sum is σ = 19427007460. Its totient is φ = 5549547456.

The previous prime is 11100121009. The next prime is 11100121031. The reversal of 11100121012 is 21012100111.

It can be written as a sum of positive squares in 2 ways, for example, as 8544414096 + 2555706916 = 92436^2 + 50554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11100121012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77337 + ... + 167872.

Almost surely, 2^11100121012 is an apocalyptic number.

It is an amenable number.

11100121012 is a deficient number, since it is larger than the sum of its proper divisors (8326886448).

11100121012 is a wasteful number, since it uses less digits than its factorization.

11100121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256530 (or 256528 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11100121012 its reverse (21012100111), we get a palindrome (32112221123).

The spelling of 11100121012 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, twelve".