111211021000001 has 16 divisors (see below), whose sum is σ = 126157767939840. Its totient is φ = 97185018291840.

The previous prime is 111211020999941. The next prime is 111211021000003. The reversal of 111211021000001 is 100000120112111.

It is a cyclic number.

It is not a de Polignac number, because 111211021000001 - 2¹⁸ = 111211020737857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111211021000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157851980 + ... + 158554941.

It is an arithmetic number, because the mean of its divisors is an integer number (7884860496240).

Almost surely, 2^{111211021000001} is an apocalyptic number.

It is an amenable number.

111211021000001 is a deficient number, since it is larger than the sum of its proper divisors (14946746939839).

111211021000001 is a wasteful number, since it uses less digits than its factorization.

111211021000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316408376.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111211021000001 its reverse (100000120112111), we get a palindrome (211211141112112).

The spelling of 111211021000001 in words is "one hundred eleven trillion, two hundred eleven billion, twenty-one million, one", and thus it is an aban number.