11015020057 has 4 divisors (see below), whose sum is σ = 11037638656. Its totient is φ = 10992401460.

The previous prime is 11015020031. The next prime is 11015020067. The reversal of 11015020057 is 75002051011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75002051011 = 19 ⋅3947476369.

It is a cyclic number.

It is not a de Polignac number, because 11015020057 - 2¹⁹ = 11014495769 is a prime.

It is a super-2 number, since 2×11015020057² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11015020067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11308569 + ... + 11309542.

It is an arithmetic number, because the mean of its divisors is an integer number (2759409664).

Almost surely, 2^11015020057 is an apocalyptic number.

It is an amenable number.

11015020057 is a deficient number, since it is larger than the sum of its proper divisors (22618599).

11015020057 is an equidigital number, since it uses as much as digits as its factorization.

11015020057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618598.

The product of its (nonzero) digits is 350, while the sum is 22.

Adding to 11015020057 its reverse (75002051011), we get a palindrome (86017071068).

The spelling of 11015020057 in words is "eleven billion, fifteen million, twenty thousand, fifty-seven".