2221211002001 has 4 divisors (see below), whose sum is σ = 2221258432692. Its totient is φ = 2221163571312.

The previous prime is 2221211001931. The next prime is 2221211002013. The reversal of 2221211002001 is 1002001121222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1115138112001 + 1106072890000 = 1056001^2 + 1051700^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221211002001 - 2²² = 2221206807697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221211002601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23645030 + ... + 23738783.

It is an arithmetic number, because the mean of its divisors is an integer number (555314608173).

Almost surely, 2^{2221211002001} is an apocalyptic number.

It is an amenable number.

2221211002001 is a deficient number, since it is larger than the sum of its proper divisors (47430691).

2221211002001 is an equidigital number, since it uses as much as digits as its factorization.

2221211002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47430690.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2221211002001 its reverse (1002001121222), we get a palindrome (3223212123223).

The spelling of 2221211002001 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two thousand, one".