2211211218001 has 2 divisors, whose sum is σ = 2211211218002. Its totient is φ = 2211211218000.

The previous prime is 2211211217993. The next prime is 2211211218017. The reversal of 2211211218001 is 1008121121122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088097250625 + 123113967376 = 1445025^2 + 350876^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211211218001 - 2³ = 2211211217993 is a prime.

It is a super-2 number, since 2×2211211218001² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211211218901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105605609000 + 1105605609001.

It is an arithmetic number, because the mean of its divisors is an integer number (1105605609001).

Almost surely, 2^{2211211218001} is an apocalyptic number.

It is an amenable number.

2211211218001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211211218001 is an equidigital number, since it uses as much as digits as its factorization.

2211211218001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 2211211218001 its reverse (1008121121122), we get a palindrome (3219332339123).

The spelling of 2211211218001 in words is "two trillion, two hundred eleven billion, two hundred eleven million, two hundred eighteen thousand, one".