221112021021 has 16 divisors (see below), whose sum is σ = 304994539200. Its totient is φ = 142319173248.

The previous prime is 221112021017. The next prime is 221112021047. The reversal of 221112021021 is 120120211122.

It is not a de Polignac number, because 221112021021 - 2² = 221112021017 is a prime.

It is a super-2 number, since 2×221112021021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112021421) 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, 3427950 + ... + 3491856.

It is an arithmetic number, because the mean of its divisors is an integer number (19062158700).

Almost surely, 2^221112021021 is an apocalyptic number.

It is an amenable number.

221112021021 is a deficient number, since it is larger than the sum of its proper divisors (83882518179).

221112021021 is a wasteful number, since it uses less digits than its factorization.

221112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103708.

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

Adding to 221112021021 its reverse (120120211122), we get a palindrome (341232232143).

The spelling of 221112021021 in words is "two hundred twenty-one billion, one hundred twelve million, twenty-one thousand, twenty-one".