11020511081 has 8 divisors (see below), whose sum is σ = 11601508800. Its totient is φ = 10439610480.

The previous prime is 11020511077. The next prime is 11020511107. The reversal of 11020511081 is 18011502011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11020511081 - 2² = 11020511077 is a prime.

It is a super-3 number, since 3×11020511081³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11040511081) 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 7 ways as a sum of consecutive naturals, for example, 390476 + ... + 417746.

It is an arithmetic number, because the mean of its divisors is an integer number (1450188600).

Almost surely, 2^11020511081 is an apocalyptic number.

It is an amenable number.

11020511081 is a deficient number, since it is larger than the sum of its proper divisors (580997719).

11020511081 is a wasteful number, since it uses less digits than its factorization.

11020511081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48559.

The product of its (nonzero) digits is 80, while the sum is 20.

The spelling of 11020511081 in words is "eleven billion, twenty million, five hundred eleven thousand, eighty-one".