211220022001 has 4 divisors (see below), whose sum is σ = 211223363572. Its totient is φ = 211216680432.

The previous prime is 211220021981. The next prime is 211220022011. The reversal of 211220022001 is 100220022112.

It is a happy number.

211220022001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11590675600 + 199629346401 = 107660^2 + 446799^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220022001 - 2¹¹ = 211220019953 is a prime.

It is a super-2 number, since 2×211220022001² (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 (211220022011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574106 + ... + 1703011.

It is an arithmetic number, because the mean of its divisors is an integer number (52805840893).

Almost surely, 2^211220022001 is an apocalyptic number.

It is an amenable number.

211220022001 is a deficient number, since it is larger than the sum of its proper divisors (3341571).

211220022001 is an equidigital number, since it uses as much as digits as its factorization.

211220022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341570.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211220022001 its reverse (100220022112), we get a palindrome (311440044113).

The spelling of 211220022001 in words is "two hundred eleven billion, two hundred twenty million, twenty-two thousand, one".