222101000220221 has 4 divisors (see below), whose sum is σ = 222108708609852. Its totient is φ = 222093291830592.

The previous prime is 222101000220031. The next prime is 222101000220233. The reversal of 222101000220221 is 122022000101222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131639710699225 + 90461289520996 = 11473435^2 + 9511114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222101000220221 is a prime.

It is a super-4 number, since 4×222101000220221⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

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 222101000220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101000220251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3854151596 + ... + 3854209221.

It is an arithmetic number, because the mean of its divisors is an integer number (55527177152463).

Almost surely, 2^{222101000220221} is an apocalyptic number.

It is an amenable number.

222101000220221 is a deficient number, since it is larger than the sum of its proper divisors (7708389631).

222101000220221 is an equidigital number, since it uses as much as digits as its factorization.

222101000220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708389630.

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

Adding to 222101000220221 its reverse (122022000101222), we get a palindrome (344123000321443).

The spelling of 222101000220221 in words is "two hundred twenty-two trillion, one hundred one billion, two hundred twenty thousand, two hundred twenty-one".