212111110101212 has 24 divisors (see below), whose sum is σ = 432226413039456. Its totient is φ = 89189577292608.

The previous prime is 212111110101211. The next prime is 212111110101227. The reversal of 212111110101212 is 212101011111212.

It is a super-2 number, since 2×212111110101212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111110101211) 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, 71466005963 + ... + 71466008930.

It is an arithmetic number, because the mean of its divisors is an integer number (18009433876644).

Almost surely, 2^{212111110101212} is an apocalyptic number.

It is an amenable number.

212111110101212 is an abundant number, since it is smaller than the sum of its proper divisors (220115302938244).

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

212111110101212 is a wasteful number, since it uses less digits than its factorization.

212111110101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142932014957 (or 142932014955 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 212111110101212 its reverse (212101011111212), we get a palindrome (424212121212424).

The spelling of 212111110101212 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred ten million, one hundred one thousand, two hundred twelve".