212021121112 has 8 divisors (see below), whose sum is σ = 397539602100. Its totient is φ = 106010560552.

The previous prime is 212021121107. The next prime is 212021121131. The reversal of 212021121112 is 211121120212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13251320062 + ... + 13251320077.

Almost surely, 2^212021121112 is an apocalyptic number.

It is an amenable number.

212021121112 is a deficient number, since it is larger than the sum of its proper divisors (185518480988).

212021121112 is a wasteful number, since it uses less digits than its factorization.

212021121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26502640145 (or 26502640141 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212021121112 its reverse (211121120212), we get a palindrome (423142241324).

The spelling of 212021121112 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred twelve".