221021111110022 has 4 divisors (see below), whose sum is σ = 331531666665036. Its totient is φ = 110510555555010.

The previous prime is 221021111109989. The next prime is 221021111110043. The reversal of 221021111110022 is 220011111120122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255277777504 + ... + 55255277777507.

It is an arithmetic number, because the mean of its divisors is an integer number (82882916666259).

Almost surely, 2^{221021111110022} is an apocalyptic number.

221021111110022 is a deficient number, since it is larger than the sum of its proper divisors (110510555555014).

221021111110022 is a wasteful number, since it uses less digits than its factorization.

221021111110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510555555013.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221021111110022 its reverse (220011111120122), we get a palindrome (441032222230144).

The spelling of 221021111110022 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred ten thousand, twenty-two".