11023012021 has 6 divisors (see below), whose sum is σ = 12822687510. Its totient is φ = 9448295976.

The previous prime is 11023012019. The next prime is 11023012043. The reversal of 11023012021 is 12021032011.

It can be written as a sum of positive squares in only one way, i.e., 5819553796 + 5203458225 = 76286^2 + 72135^2 .

It is not a de Polignac number, because 11023012021 - 2¹ = 11023012019 is a prime.

It is a super-2 number, since 2×11023012021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11023011992 and 11023012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023012321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112479666 + ... + 112479763.

It is an arithmetic number, because the mean of its divisors is an integer number (2137114585).

Almost surely, 2^11023012021 is an apocalyptic number.

It is an amenable number.

11023012021 is a deficient number, since it is larger than the sum of its proper divisors (1799675489).

11023012021 is an equidigital number, since it uses as much as digits as its factorization.

11023012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224959443 (or 224959436 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11023012021 its reverse (12021032011), we get a palindrome (23044044032).

The spelling of 11023012021 in words is "eleven billion, twenty-three million, twelve thousand, twenty-one".