11020021191 has 16 divisors (see below), whose sum is σ = 16484465920. Its totient is φ = 7275351960.

The previous prime is 11020021043. The next prime is 11020021193. The reversal of 11020021191 is 19112002011.

It is a happy number.

It is not a de Polignac number, because 11020021191 - 2¹⁵ = 11019988423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020021193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1978525 + ... + 1984086.

It is an arithmetic number, because the mean of its divisors is an integer number (1030279120).

Almost surely, 2^11020021191 is an apocalyptic number.

11020021191 is a deficient number, since it is larger than the sum of its proper divisors (5464444729).

11020021191 is a wasteful number, since it uses less digits than its factorization.

11020021191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962723 (or 3962717 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 11020021191 in words is "eleven billion, twenty million, twenty-one thousand, one hundred ninety-one".