211231222012 has 6 divisors (see below), whose sum is σ = 369654638528. Its totient is φ = 105615611004.

The previous prime is 211231222001. The next prime is 211231222019. The reversal of 211231222012 is 210222132112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231222019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26403902748 + ... + 26403902755.

Almost surely, 2^211231222012 is an apocalyptic number.

It is an amenable number.

211231222012 is a deficient number, since it is larger than the sum of its proper divisors (158423416516).

211231222012 is a wasteful number, since it uses less digits than its factorization.

211231222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52807805507 (or 52807805505 counting only the distinct ones).

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

Adding to 211231222012 its reverse (210222132112), we get a palindrome (421453354124).

The spelling of 211231222012 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred twenty-two thousand, twelve".