11021220023 has 12 divisors (see below), whose sum is σ = 12148991400. Its totient is φ = 9990544080.

The previous prime is 11021219999. The next prime is 11021220121. The reversal of 11021220023 is 32002212011.

It is a happy number.

It is not a de Polignac number, because 11021220023 - 2⁶ = 11021219959 is a prime.

It is a super-2 number, since 2×11021220023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021220923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88265 + ... + 172722.

It is an arithmetic number, because the mean of its divisors is an integer number (1012415950).

Almost surely, 2^11021220023 is an apocalyptic number.

11021220023 is a deficient number, since it is larger than the sum of its proper divisors (1127771377).

11021220023 is a wasteful number, since it uses less digits than its factorization.

11021220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261358 (or 261347 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 11021220023 its reverse (32002212011), we get a palindrome (43023432034).

The spelling of 11021220023 in words is "eleven billion, twenty-one million, two hundred twenty thousand, twenty-three".