211222211001001 has 4 divisors (see below), whose sum is σ = 211222347052500. Its totient is φ = 211222074949504.

The previous prime is 211222211000993. The next prime is 211222211001013. The reversal of 211222211001001 is 100100112222112.

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 147782340043776 + 63439870957225 = 12156576^2 + 7964915^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222211001001 - 2³ = 211222211000993 is a prime.

It is a super-2 number, since 2×211222211001001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211222211001031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65669776 + ... + 68811073.

It is an arithmetic number, because the mean of its divisors is an integer number (52805586763125).

Almost surely, 2^{211222211001001} is an apocalyptic number.

It is an amenable number.

211222211001001 is a deficient number, since it is larger than the sum of its proper divisors (136051499).

211222211001001 is a wasteful number, since it uses less digits than its factorization.

211222211001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136051498.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211222211001001 its reverse (100100112222112), we get a palindrome (311322323223113).

The spelling of 211222211001001 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, one thousand, one".