221120232021 has 32 divisors (see below), whose sum is σ = 356748336000. Its totient is φ = 134545048704.

The previous prime is 221120232017. The next prime is 221120232029. The reversal of 221120232021 is 120232021122.

221120232021 is a `hidden beast` number, since 221 + 120 + 2 + 320 + 2 + 1 = 666.

It is not a de Polignac number, because 221120232021 - 2² = 221120232017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221120231985 and 221120232003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120232029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3507931 + ... + 3570408.

It is an arithmetic number, because the mean of its divisors is an integer number (11148385500).

Almost surely, 2^221120232021 is an apocalyptic number.

It is an amenable number.

221120232021 is a deficient number, since it is larger than the sum of its proper divisors (135628103979).

221120232021 is a wasteful number, since it uses less digits than its factorization.

221120232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078450 (or 7078444 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221120232021 its reverse (120232021122), we get a palindrome (341352253143).

The spelling of 221120232021 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred thirty-two thousand, twenty-one".