11021020111 has 4 divisors (see below), whose sum is σ = 11130139224. Its totient is φ = 10911901000.

The previous prime is 11021020097. The next prime is 11021020123. The reversal of 11021020111 is 11102012011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11102012011 = 101 ⋅109920911.

It is a cyclic number.

It is not a de Polignac number, because 11021020111 - 2¹⁷ = 11020889039 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 (11021020811) 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, 54559405 + ... + 54559606.

It is an arithmetic number, because the mean of its divisors is an integer number (2782534806).

Almost surely, 2^11021020111 is an apocalyptic number.

11021020111 is a deficient number, since it is larger than the sum of its proper divisors (109119113).

11021020111 is a wasteful number, since it uses less digits than its factorization.

11021020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109119112.

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

Adding to 11021020111 its reverse (11102012011), we get a palindrome (22123032122).

It can be divided in two parts, 110210 and 20111, that added together give a 4-th power (130321 = 19⁴).

The spelling of 11021020111 in words is "eleven billion, twenty-one million, twenty thousand, one hundred eleven".