221020112010111 has 16 divisors (see below), whose sum is σ = 302995081148928. Its totient is φ = 143222464785600.

The previous prime is 221020112010067. The next prime is 221020112010121. The reversal of 221020112010111 is 111010211020122.

It is a happy number.

It is not a de Polignac number, because 221020112010111 - 2²³ = 221020103621503 is a prime.

It is a super-3 number, since 3×221020112010111³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020112010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315301501 + ... + 3315368166.

It is an arithmetic number, because the mean of its divisors is an integer number (18937192571808).

Almost surely, 2^{221020112010111} is an apocalyptic number.

221020112010111 is a deficient number, since it is larger than the sum of its proper divisors (81974969138817).

221020112010111 is a wasteful number, since it uses less digits than its factorization.

221020112010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630669982.

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

Adding to 221020112010111 its reverse (111010211020122), we get a palindrome (332030323030233).

The spelling of 221020112010111 in words is "two hundred twenty-one trillion, twenty billion, one hundred twelve million, ten thousand, one hundred eleven".