211220222212 has 24 divisors (see below), whose sum is σ = 373387262976. Its totient is φ = 104541903648.

The previous prime is 211220222189. The next prime is 211220222261. The reversal of 211220222212 is 212222022112.

It is a super-2 number, since 2×211220222212² (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 211220222212.

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, 244243 + ... + 694330.

It is an arithmetic number, because the mean of its divisors is an integer number (15557802624).

Almost surely, 2^211220222212 is an apocalyptic number.

It is an amenable number.

211220222212 is a deficient number, since it is larger than the sum of its proper divisors (162167040764).

211220222212 is a wasteful number, since it uses less digits than its factorization.

211220222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939147 (or 939145 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211220222212 its reverse (212222022112), we get a palindrome (423442244324).

The spelling of 211220222212 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twelve".