111211200102001 has 4 divisors (see below), whose sum is σ = 111211762230900. Its totient is φ = 111210637973104.

The previous prime is 111211200101999. The next prime is 111211200102007. The reversal of 111211200102001 is 100201002112111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66455902898401 + 44755297203600 = 8152049^2 + 6689940^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211200102001 - 2¹ = 111211200101999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211200102007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280767586 + ... + 281163403.

It is an arithmetic number, because the mean of its divisors is an integer number (27802940557725).

Almost surely, 2^{111211200102001} is an apocalyptic number.

It is an amenable number.

111211200102001 is a deficient number, since it is larger than the sum of its proper divisors (562128899).

111211200102001 is an equidigital number, since it uses as much as digits as its factorization.

111211200102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562128898.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111211200102001 its reverse (100201002112111), we get a palindrome (211412202214112).

The spelling of 111211200102001 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred million, one hundred two thousand, one".