211211223001 has 16 divisors (see below), whose sum is σ = 219051043200. Its totient is φ = 203515095168.

The previous prime is 211211222953. The next prime is 211211223007. The reversal of 211211223001 is 100322112112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211211223001 is a prime.

It is a super-2 number, since 2×211211223001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211223007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1617195 + ... + 1742911.

It is an arithmetic number, because the mean of its divisors is an integer number (13690690200).

Almost surely, 2^211211223001 is an apocalyptic number.

It is an amenable number.

211211223001 is a deficient number, since it is larger than the sum of its proper divisors (7839820199).

211211223001 is a wasteful number, since it uses less digits than its factorization.

211211223001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126288.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211211223001 its reverse (100322112112), we get a palindrome (311533335113).

The spelling of 211211223001 in words is "two hundred eleven billion, two hundred eleven million, two hundred twenty-three thousand, one".