2220221001001 has 6 divisors (see below), whose sum is σ = 2358504662270. Its totient is φ = 2089619765376.

The previous prime is 2220221000993. The next prime is 2220221001029. The reversal of 2220221001001 is 1001001220222.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1275038438976 + 945182562025 = 1129176^2 + 972205^2 .

It is not a de Polignac number, because 2220221001001 - 2³ = 2220221000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220221001601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3841212516 + ... + 3841213093.

Almost surely, 2^{2220221001001} is an apocalyptic number.

It is an amenable number.

2220221001001 is a deficient number, since it is larger than the sum of its proper divisors (138283661269).

2220221001001 is an equidigital number, since it uses as much as digits as its factorization.

2220221001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682425643 (or 7682425626 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2220221001001 its reverse (1001001220222), we get a palindrome (3221222221223).

The spelling of 2220221001001 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, one thousand, one".