11011021999957 has 6 divisors (see below), whose sum is σ = 12808739877558. Its totient is φ = 9438018857064.

The previous prime is 11011021999951. The next prime is 11011021999979. The reversal of 11011021999957 is 75999912011011.

It can be written as a sum of positive squares in only one way, i.e., 10700690558481 + 310331441476 = 3271191^2 + 557074^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11011021999957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011021999898 and 11011021999907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011021999951) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 112357367298 + ... + 112357367395.

It is an arithmetic number, because the mean of its divisors is an integer number (2134789979593).

Almost surely, 2^{11011021999957} is an apocalyptic number.

It is an amenable number.

11011021999957 is a deficient number, since it is larger than the sum of its proper divisors (1797717877601).

11011021999957 is an equidigital number, since it uses as much as digits as its factorization.

11011021999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224714734707 (or 224714734700 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 55.

The spelling of 11011021999957 in words is "eleven trillion, eleven billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred fifty-seven".