221020111111002 has 16 divisors (see below), whose sum is σ = 505188825396672. Its totient is φ = 63148603174560.

The previous prime is 221020111110979. The next prime is 221020111111087. The reversal of 221020111111002 is 200111111020122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2631191798899 + ... + 2631191798982.

It is an arithmetic number, because the mean of its divisors is an integer number (31574301587292).

Almost surely, 2^{221020111111002} is an apocalyptic number.

221020111111002 is an abundant number, since it is smaller than the sum of its proper divisors (284168714285670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221020111111002 is a wasteful number, since it uses less digits than its factorization.

221020111111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262383597893.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221020111111002 its reverse (200111111020122), we get a palindrome (421131222131124).

The spelling of 221020111111002 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, one hundred eleven thousand, two".