1000122220221 has 8 divisors (see below), whose sum is σ = 1345297146240. Its totient is φ = 660847720512.

The previous prime is 1000122220199. The next prime is 1000122220243. The reversal of 1000122220221 is 1220222210001.

It is an interprime number because it is at equal distance from previous prime (1000122220199) and next prime (1000122220243).

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

It is not a de Polignac number, because 1000122220221 - 2²¹ = 1000120123069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000122220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000122220261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475106181 + ... + 1475106858.

It is an arithmetic number, because the mean of its divisors is an integer number (168162143280).

Almost surely, 2^{1000122220221} is an apocalyptic number.

It is an amenable number.

1000122220221 is a deficient number, since it is larger than the sum of its proper divisors (345174926019).

1000122220221 is a wasteful number, since it uses less digits than its factorization.

1000122220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950213155.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1000122220221 its reverse (1220222210001), we get a palindrome (2220344430222).

The spelling of 1000122220221 in words is "one trillion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".