211221201201 has 16 divisors (see below), whose sum is σ = 293937014400. Its totient is φ = 134662429440.

The previous prime is 211221201173. The next prime is 211221201259. The reversal of 211221201201 is 102102122112.

It is not a de Polignac number, because 211221201201 - 2⁷ = 211221201073 is a prime.

It is a super-2 number, since 2×211221201201² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221271201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12376 + ... + 650073.

It is an arithmetic number, because the mean of its divisors is an integer number (18371063400).

Almost surely, 2^211221201201 is an apocalyptic number.

It is an amenable number.

211221201201 is a deficient number, since it is larger than the sum of its proper divisors (82715813199).

211221201201 is a wasteful number, since it uses less digits than its factorization.

211221201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667096.

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

Adding to 211221201201 its reverse (102102122112), we get a palindrome (313323323313).

The spelling of 211221201201 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, two hundred one".