22001111221021 has 16 divisors (see below), whose sum is σ = 23600991254400. Its totient is φ = 20445589315008.

The previous prime is 22001111220947. The next prime is 22001111221109. The reversal of 22001111221021 is 12012211110022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22001111221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001111220986 and 22001111221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001111221121) 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, 2496855 + ... + 7087771.

It is an arithmetic number, because the mean of its divisors is an integer number (1475061953400).

Almost surely, 2^{22001111221021} is an apocalyptic number.

It is an amenable number.

22001111221021 is a deficient number, since it is larger than the sum of its proper divisors (1599880033379).

22001111221021 is a wasteful number, since it uses less digits than its factorization.

22001111221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595748.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22001111221021 its reverse (12012211110022), we get a palindrome (34013322331043).

The spelling of 22001111221021 in words is "twenty-two trillion, one billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".