211211220111212 has 12 divisors (see below), whose sum is σ = 369620059818240. Its totient is φ = 105605488734576.

The previous prime is 211211220111193. The next prime is 211211220111247. The reversal of 211211220111212 is 212111022112112.

It is a happy number.

211211220111212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211211220111212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26355287 + ... + 33421902.

It is an arithmetic number, because the mean of its divisors is an integer number (30801671651520).

Almost surely, 2^{211211220111212} is an apocalyptic number.

It is an amenable number.

211211220111212 is a deficient number, since it is larger than the sum of its proper divisors (158408839707028).

211211220111212 is a wasteful number, since it uses less digits than its factorization.

211211220111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60660520 (or 60660518 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211211220111212 its reverse (212111022112112), we get a palindrome (423322242223324).

The spelling of 211211220111212 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred eleven thousand, two hundred twelve".