10001221022222 has 4 divisors (see below), whose sum is σ = 15001831533336. Its totient is φ = 5000610511110.

The previous prime is 10001221022189. The next prime is 10001221022231. The reversal of 10001221022222 is 22222012210001.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 10001221022222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500305255554 + ... + 2500305255557.

It is an arithmetic number, because the mean of its divisors is an integer number (3750457883334).

Almost surely, 2^{10001221022222} is an apocalyptic number.

10001221022222 is a deficient number, since it is larger than the sum of its proper divisors (5000610511114).

10001221022222 is an equidigital number, since it uses as much as digits as its factorization.

10001221022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000610511113.

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

Adding to 10001221022222 its reverse (22222012210001), we get a palindrome (32223233232223).

The spelling of 10001221022222 in words is "ten trillion, one billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-two".