111212021021212 has 12 divisors (see below), whose sum is σ = 195786432218160. Its totient is φ = 55273040387456.

The previous prime is 111212021021203. The next prime is 111212021021219. The reversal of 111212021021212 is 212120120212111.

It is a happy number.

It is a super-2 number, since 2×111212021021212² (a number of 29 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 111212021021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212021021219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83242530037 + ... + 83242531372.

It is an arithmetic number, because the mean of its divisors is an integer number (16315536018180).

Almost surely, 2^{111212021021212} is an apocalyptic number.

It is an amenable number.

111212021021212 is a deficient number, since it is larger than the sum of its proper divisors (84574411196948).

111212021021212 is a wasteful number, since it uses less digits than its factorization.

111212021021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166485061580 (or 166485061578 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111212021021212 its reverse (212120120212111), we get a palindrome (323332141233323).

The spelling of 111212021021212 in words is "one hundred eleven trillion, two hundred twelve billion, twenty-one million, twenty-one thousand, two hundred twelve".