2221001012111 has 4 divisors (see below), whose sum is σ = 2538286870992. Its totient is φ = 1903715153232.

The previous prime is 2221001012081. The next prime is 2221001012119. The reversal of 2221001012111 is 1112101001222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221001012111 - 2¹⁰ = 2221001011087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001012119) 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, 158642929430 + ... + 158642929443.

It is an arithmetic number, because the mean of its divisors is an integer number (634571717748).

Almost surely, 2^{2221001012111} is an apocalyptic number.

2221001012111 is a deficient number, since it is larger than the sum of its proper divisors (317285858881).

2221001012111 is an equidigital number, since it uses as much as digits as its factorization.

2221001012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317285858880.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2221001012111 its reverse (1112101001222), we get a palindrome (3333102013333).

The spelling of 2221001012111 in words is "two trillion, two hundred twenty-one billion, one million, twelve thousand, one hundred eleven".