1001201221222 has 4 divisors (see below), whose sum is σ = 1501801831836. Its totient is φ = 500600610610.

The previous prime is 1001201221193. The next prime is 1001201221249. The reversal of 1001201221222 is 2221221021001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001201221196 and 1001201221205.

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, 250300305304 + ... + 250300305307.

It is an arithmetic number, because the mean of its divisors is an integer number (375450457959).

Almost surely, 2^{1001201221222} is an apocalyptic number.

1001201221222 is a deficient number, since it is larger than the sum of its proper divisors (500600610614).

1001201221222 is an equidigital number, since it uses as much as digits as its factorization.

1001201221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500600610613.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1001201221222 its reverse (2221221021001), we get a palindrome (3222422242223).

The spelling of 1001201221222 in words is "one trillion, one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-two".