221112221020101 has 20 divisors (see below), whose sum is σ = 340958390999424. Its totient is φ = 142653045817800.

The previous prime is 221112221020073. The next prime is 221112221020111. The reversal of 221112221020101 is 101020122211122.

221112221020101 is a `hidden beast` number, since 2 + 211 + 122 + 210 + 20 + 101 = 666.

It is not a de Polignac number, because 221112221020101 - 2⁹ = 221112221019589 is a prime.

It is a super-2 number, since 2×221112221020101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112221020111) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44028715335 + ... + 44028720356.

Almost surely, 2^{221112221020101} is an apocalyptic number.

It is an amenable number.

221112221020101 is a deficient number, since it is larger than the sum of its proper divisors (119846169979323).

221112221020101 is an equidigital number, since it uses as much as digits as its factorization.

221112221020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88057435734 (or 88057435725 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221112221020101 its reverse (101020122211122), we get a palindrome (322132343231223).

The spelling of 221112221020101 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, twenty thousand, one hundred one".