11111232021 has 16 divisors (see below), whose sum is σ = 14897520000. Its totient is φ = 7366253888.

The previous prime is 11111232007. The next prime is 11111232029. The reversal of 11111232021 is 12023211111.

11111232021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11111232021 - 2⁷ = 11111231893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111232029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1769275 + ... + 1775543.

It is an arithmetic number, because the mean of its divisors is an integer number (931095000).

Almost surely, 2^11111232021 is an apocalyptic number.

It is an amenable number.

11111232021 is a deficient number, since it is larger than the sum of its proper divisors (3786287979).

11111232021 is a wasteful number, since it uses less digits than its factorization.

11111232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11111232021 its reverse (12023211111), we get a palindrome (23134443132).

The spelling of 11111232021 in words is "eleven billion, one hundred eleven million, two hundred thirty-two thousand, twenty-one".