211223111012 has 6 divisors (see below), whose sum is σ = 369640444278. Its totient is φ = 105611555504.

The previous prime is 211223110993. The next prime is 211223111059. The reversal of 211223111012 is 210111322112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 130627307776 + 80595803236 = 361424^2 + 283894^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26402888873 + ... + 26402888880.

It is an arithmetic number, because the mean of its divisors is an integer number (61606740713).

Almost surely, 2^211223111012 is an apocalyptic number.

It is an amenable number.

211223111012 is a deficient number, since it is larger than the sum of its proper divisors (158417333266).

211223111012 is a wasteful number, since it uses less digits than its factorization.

211223111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52805777757 (or 52805777755 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211223111012 its reverse (210111322112), we get a palindrome (421334433124).

The spelling of 211223111012 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred eleven thousand, twelve".