211321220212 has 24 divisors (see below), whose sum is σ = 384088491360. Its totient is φ = 101610684000.

The previous prime is 211321220203. The next prime is 211321220233. The reversal of 211321220212 is 212022123112.

It is a super-2 number, since 2×211321220212² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211321220212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3599838 + ... + 3658069.

It is an arithmetic number, because the mean of its divisors is an integer number (16003687140).

Almost surely, 2^211321220212 is an apocalyptic number.

It is an amenable number.

211321220212 is a deficient number, since it is larger than the sum of its proper divisors (172767271148).

211321220212 is a wasteful number, since it uses less digits than its factorization.

211321220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258191 (or 7258189 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211321220212 its reverse (212022123112), we get a palindrome (423343343324).

The spelling of 211321220212 in words is "two hundred eleven billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twelve".