22011010021 has 32 divisors (see below), whose sum is σ = 29588122368. Its totient is φ = 15813411840.

The previous prime is 22011010019. The next prime is 22011010033. The reversal of 22011010021 is 12001011022.

It is a cyclic number.

It is not a de Polignac number, because 22011010021 - 2¹ = 22011010019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011040021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865341 + ... + 890413.

It is an arithmetic number, because the mean of its divisors is an integer number (924628824).

Almost surely, 2^22011010021 is an apocalyptic number.

It is an amenable number.

22011010021 is a deficient number, since it is larger than the sum of its proper divisors (7577112347).

22011010021 is a wasteful number, since it uses less digits than its factorization.

22011010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25981.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 22011010021 its reverse (12001011022), we get a palindrome (34012021043).

The spelling of 22011010021 in words is "twenty-two billion, eleven million, ten thousand, twenty-one".