221120011021 has 16 divisors (see below), whose sum is σ = 272178062464. Its totient is φ = 174932581824.

The previous prime is 221120011019. The next prime is 221120011037. The reversal of 221120011021 is 120110021122.

It is not a de Polignac number, because 221120011021 - 2¹ = 221120011019 is a prime.

It is a super-2 number, since 2×221120011021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 221120010992 and 221120011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120011001) 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, 713875 + ... + 975631.

It is an arithmetic number, because the mean of its divisors is an integer number (17011128904).

Almost surely, 2^221120011021 is an apocalyptic number.

It is an amenable number.

221120011021 is a deficient number, since it is larger than the sum of its proper divisors (51058051443).

221120011021 is a wasteful number, since it uses less digits than its factorization.

221120011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271060.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221120011021 its reverse (120110021122), we get a palindrome (341230032143).

The spelling of 221120011021 in words is "two hundred twenty-one billion, one hundred twenty million, eleven thousand, twenty-one".