211221201022 has 16 divisors (see below), whose sum is σ = 349138445040. Its totient is φ = 95219574912.

The previous prime is 211221200977. The next prime is 211221201041. The reversal of 211221201022 is 220102122112.

It is a happy number.

211221201022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221201022² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221200987 and 211221201005.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 94462747 + ... + 94464982.

It is an arithmetic number, because the mean of its divisors is an integer number (21821152815).

Almost surely, 2^211221201022 is an apocalyptic number.

211221201022 is a deficient number, since it is larger than the sum of its proper divisors (137917244018).

211221201022 is a wasteful number, since it uses less digits than its factorization.

211221201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188927787.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211221201022 its reverse (220102122112), we get a palindrome (431323323134).

The spelling of 211221201022 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, twenty-two".