221120201112021 has 64 divisors (see below), whose sum is σ = 345383278018560. Its totient is φ = 139608447143040.

The previous prime is 221120201111993. The next prime is 221120201112077. The reversal of 221120201112021 is 120211102021122.

221120201112021 is a `hidden beast` number, since 221 + 120 + 201 + 1 + 120 + 2 + 1 = 666.

221120201112021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221120201112021 - 2⁵ = 221120201111989 is a prime.

It is a super-2 number, since 2×221120201112021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221120201111985 and 221120201112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120201119021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 385904680 + ... + 386477246.

It is an arithmetic number, because the mean of its divisors is an integer number (5396613719040).

Almost surely, 2^{221120201112021} is an apocalyptic number.

It is an amenable number.

221120201112021 is a deficient number, since it is larger than the sum of its proper divisors (124263076906539).

221120201112021 is a wasteful number, since it uses less digits than its factorization.

221120201112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582471 (or 582465 counting only the distinct ones).

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

Adding to 221120201112021 its reverse (120211102021122), we get a palindrome (341331303133143).

The spelling of 221120201112021 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred one million, one hundred twelve thousand, twenty-one".