212111202112 has 56 divisors (see below), whose sum is σ = 450080253000. Its totient is φ = 98828697600.

The previous prime is 212111202103. The next prime is 212111202119. The reversal of 212111202112 is 211202111212.

It can be written as a sum of positive squares in 4 ways, for example, as 137896366336 + 74214835776 = 371344^2 + 272424^2 .

It is a super-2 number, since 2×212111202112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111202119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855237 + ... + 1075012.

It is an arithmetic number, because the mean of its divisors is an integer number (8037147375).

Almost surely, 2^212111202112 is an apocalyptic number.

It is an amenable number.

212111202112 is an abundant number, since it is smaller than the sum of its proper divisors (237969050888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212111202112 is a wasteful number, since it uses less digits than its factorization.

212111202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930379 (or 1930369 counting only the distinct ones).

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

Adding to 212111202112 its reverse (211202111212), we get a palindrome (423313313324).

The spelling of 212111202112 in words is "two hundred twelve billion, one hundred eleven million, two hundred two thousand, one hundred twelve".