2215663221001 has 8 divisors (see below), whose sum is σ = 2221148505800. Its totient is φ = 2210178268800.

The previous prime is 2215663220989. The next prime is 2215663221043. The reversal of 2215663221001 is 1001223665122.

2215663221001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 422728830976 + 1792934390025 = 650176^2 + 1339005^2 .

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-2215663221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215663201001) 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, 18222115 + ... + 18343303.

It is an arithmetic number, because the mean of its divisors is an integer number (277643563225).

Almost surely, 2^{2215663221001} is an apocalyptic number.

It is an amenable number.

2215663221001 is a deficient number, since it is larger than the sum of its proper divisors (5485284799).

2215663221001 is a wasteful number, since it uses less digits than its factorization.

2215663221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166299.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 2215663221001 its reverse (1001223665122), we get a palindrome (3216886886123).

The spelling of 2215663221001 in words is "two trillion, two hundred fifteen billion, six hundred sixty-three million, two hundred twenty-one thousand, one".