2221020021111 has 16 divisors (see below), whose sum is σ = 2963789936640. Its totient is φ = 1479465519840.

The previous prime is 2221020021097. The next prime is 2221020021137. The reversal of 2221020021111 is 1111200201222.

It is not a de Polignac number, because 2221020021111 - 2⁶ = 2221020021047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221020021161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20225010 + ... + 20334528.

It is an arithmetic number, because the mean of its divisors is an integer number (185236871040).

Almost surely, 2^{2221020021111} is an apocalyptic number.

2221020021111 is a deficient number, since it is larger than the sum of its proper divisors (742769915529).

2221020021111 is a wasteful number, since it uses less digits than its factorization.

2221020021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115006.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2221020021111 its reverse (1111200201222), we get a palindrome (3332220222333).

The spelling of 2221020021111 in words is "two trillion, two hundred twenty-one billion, twenty million, twenty-one thousand, one hundred eleven".