211221212202201 has 16 divisors (see below), whose sum is σ = 300875463315200. Its totient is φ = 131411783237328.

The previous prime is 211221212202197. The next prime is 211221212202269. The reversal of 211221212202201 is 102202212122112.

It is not a de Polignac number, because 211221212202201 - 2² = 211221212202197 is a prime.

It is a super-2 number, since 2×211221212202201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221212202601) 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 15 ways as a sum of consecutive naturals, for example, 27653990971 + ... + 27653998608.

It is an arithmetic number, because the mean of its divisors is an integer number (18804716457200).

Almost surely, 2^{211221212202201} is an apocalyptic number.

It is an amenable number.

211221212202201 is a deficient number, since it is larger than the sum of its proper divisors (89654251112999).

211221212202201 is a wasteful number, since it uses less digits than its factorization.

211221212202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55307989668.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211221212202201 its reverse (102202212122112), we get a palindrome (313423424324313).

The spelling of 211221212202201 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred one".