211221220101201 has 12 divisors (see below), whose sum is σ = 305098804295428. Its totient is φ = 140813460716544.

The previous prime is 211221220101137. The next prime is 211221220101253. The reversal of 211221220101201 is 102101022122112.

211221220101201 is a `hidden beast` number, since 2 + 11 + 221 + 220 + 10 + 1 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 135020890782801 + 76200329318400 = 11619849^2 + 8729280^2 .

It is not a de Polignac number, because 211221220101201 - 2⁶ = 211221220101137 is a prime.

It is a super-2 number, since 2×211221220101201² (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 (211221220101301) 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 11 ways as a sum of consecutive naturals, for example, 55214620 + ... + 58916013.

Almost surely, 2^{211221220101201} is an apocalyptic number.

It is an amenable number.

211221220101201 is a deficient number, since it is larger than the sum of its proper divisors (93877584194227).

211221220101201 is a wasteful number, since it uses less digits than its factorization.

211221220101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114336272 (or 114336269 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211221220101201 its reverse (102101022122112), we get a palindrome (313322242223313).

The spelling of 211221220101201 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred one thousand, two hundred one".