111221001200001 has 64 divisors (see below), whose sum is σ = 185931256135680. Its totient is φ = 57450809424960.

The previous prime is 111221001199949. The next prime is 111221001200009. The reversal of 111221001200001 is 100002100122111.

It is not a de Polignac number, because 111221001200001 - 2¹⁰ = 111221001198977 is a prime.

It is a super-2 number, since 2×111221001200001² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111221001200001.

It is not an unprimeable number, because it can be changed into a prime (111221001200009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 749459130 + ... + 749607516.

It is an arithmetic number, because the mean of its divisors is an integer number (2905175877120).

Almost surely, 2^{111221001200001} is an apocalyptic number.

111221001200001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221001200001 is a deficient number, since it is larger than the sum of its proper divisors (74710254935679).

111221001200001 is a wasteful number, since it uses less digits than its factorization.

111221001200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166714.

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

Adding to 111221001200001 its reverse (100002100122111), we get a palindrome (211223101322112).

The spelling of 111221001200001 in words is "one hundred eleven trillion, two hundred twenty-one billion, one million, two hundred thousand, one".