201111111212 has 24 divisors (see below), whose sum is σ = 385078708560. Its totient is φ = 91142876160.

The previous prime is 201111111209. The next prime is 201111111233. The reversal of 201111111212 is 212111111102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6766637 + ... + 6796292.

It is an arithmetic number, because the mean of its divisors is an integer number (16044946190).

Almost surely, 2^201111111212 is an apocalyptic number.

201111111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201111111212 is a deficient number, since it is larger than the sum of its proper divisors (183967597348).

201111111212 is a wasteful number, since it uses less digits than its factorization.

201111111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563281 (or 13563279 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201111111212 its reverse (212111111102), we get a palindrome (413222222314).

The spelling of 201111111212 in words is "two hundred one billion, one hundred eleven million, one hundred eleven thousand, two hundred twelve".