1000022100221 has 8 divisors (see below), whose sum is σ = 1003746572544. Its totient is φ = 996297881040.

The previous prime is 1000022100193. The next prime is 1000022100239. The reversal of 1000022100221 is 1220012200001.

It is a happy number.

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-1000022100221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000022100241) 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, 12396800 + ... + 12477206.

It is an arithmetic number, because the mean of its divisors is an integer number (125468321568).

Almost surely, 2^{1000022100221} is an apocalyptic number.

It is an amenable number.

1000022100221 is a deficient number, since it is larger than the sum of its proper divisors (3724472323).

1000022100221 is an equidigital number, since it uses as much as digits as its factorization.

1000022100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126571.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1000022100221 its reverse (1220012200001), we get a palindrome (2220034300222).

The spelling of 1000022100221 in words is "one trillion, twenty-two million, one hundred thousand, two hundred twenty-one".