22101002022221 has 8 divisors (see below), whose sum is σ = 22463713217688. Its totient is φ = 21738303720000.

The previous prime is 22101002022199. The next prime is 22101002022227. The reversal of 22101002022221 is 12222020010122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3262051393225 + 18838950628996 = 1806115^2 + 4340386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22101002022221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22101002022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101002022227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263831 + ... + 6653691.

It is an arithmetic number, because the mean of its divisors is an integer number (2807964152211).

Almost surely, 2^{22101002022221} is an apocalyptic number.

It is an amenable number.

22101002022221 is a deficient number, since it is larger than the sum of its proper divisors (362711195467).

22101002022221 is an equidigital number, since it uses as much as digits as its factorization.

22101002022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446623.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22101002022221 its reverse (12222020010122), we get a palindrome (34323022032343).

The spelling of 22101002022221 in words is "twenty-two trillion, one hundred one billion, two million, twenty-two thousand, two hundred twenty-one".