1001200222221 has 8 divisors (see below), whose sum is σ = 1347894150720. Its totient is φ = 660986554272.

The previous prime is 1001200222193. The next prime is 1001200222237. The reversal of 1001200222221 is 1222220021001.

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

It is not a de Polignac number, because 1001200222221 - 2⁷ = 1001200222093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001200222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200220221) 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, 1620064776 + ... + 1620065393.

It is an arithmetic number, because the mean of its divisors is an integer number (168486768840).

Almost surely, 2^{1001200222221} is an apocalyptic number.

It is an amenable number.

1001200222221 is a deficient number, since it is larger than the sum of its proper divisors (346693928499).

1001200222221 is a wasteful number, since it uses less digits than its factorization.

1001200222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240130275.

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

Adding to 1001200222221 its reverse (1222220021001), we get a palindrome (2223420243222).

The spelling of 1001200222221 in words is "one trillion, one billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".