211211222001 has 16 divisors (see below), whose sum is σ = 304405093440. Its totient is φ = 129492947520.

The previous prime is 211211221987. The next prime is 211211222011. The reversal of 211211222001 is 100222112112.

It is not a de Polignac number, because 211211222001 - 2⁹ = 211211221489 is a prime.

It is a super-2 number, since 2×211211222001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211222011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10055815 + ... + 10076796.

It is an arithmetic number, because the mean of its divisors is an integer number (19025318340).

Almost surely, 2^211211222001 is an apocalyptic number.

It is an amenable number.

211211222001 is a deficient number, since it is larger than the sum of its proper divisors (93193871439).

211211222001 is a wasteful number, since it uses less digits than its factorization.

211211222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132896.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211211222001 its reverse (100222112112), we get a palindrome (311433334113).

The spelling of 211211222001 in words is "two hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, one".