10111221220201 has 4 divisors (see below), whose sum is σ = 10111311378900. Its totient is φ = 10111131061504.

The previous prime is 10111221220187. The next prime is 10111221220207. The reversal of 10111221220201 is 10202212211101.

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 6509667474025 + 3601553746176 = 2551405^2 + 1897776^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111221220201 - 2⁷ = 10111221220073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10111221220207) 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, 44910916 + ... + 45135493.

It is an arithmetic number, because the mean of its divisors is an integer number (2527827844725).

Almost surely, 2^{10111221220201} is an apocalyptic number.

It is an amenable number.

10111221220201 is a deficient number, since it is larger than the sum of its proper divisors (90158699).

10111221220201 is an equidigital number, since it uses as much as digits as its factorization.

10111221220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90158698.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10111221220201 its reverse (10202212211101), we get a palindrome (20313433431302).

The spelling of 10111221220201 in words is "ten trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred one".