111212102001 has 192 divisors, whose sum is σ = 219757708800. Its totient is φ = 48453672960.

The previous prime is 111212101981. The next prime is 111212102003. The reversal of 111212102001 is 100201212111.

It is not a de Polignac number, because 111212102001 - 2⁷ = 111212101873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111212102003) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16281855 + ... + 16288683.

It is an arithmetic number, because the mean of its divisors is an integer number (1144571400).

Almost surely, 2^111212102001 is an apocalyptic number.

111212102001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111212102001 is a deficient number, since it is larger than the sum of its proper divisors (108545606799).

111212102001 is a wasteful number, since it uses less digits than its factorization.

111212102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920 (or 6909 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111212102001 its reverse (100201212111), we get a palindrome (211413314112).

The spelling of 111212102001 in words is "one hundred eleven billion, two hundred twelve million, one hundred two thousand, one".