221012021032 has 64 divisors (see below), whose sum is σ = 457034011200. Its totient is φ = 99359040000.

The previous prime is 221012020981. The next prime is 221012021033. The reversal of 221012021032 is 230120210122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221012020997 and 221012021015.

It is not an unprimeable number, because it can be changed into a prime (221012021033) 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, 8617444 + ... + 8643052.

It is an arithmetic number, because the mean of its divisors is an integer number (7141156425).

Almost surely, 2^221012021032 is an apocalyptic number.

221012021032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221012021032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228517005600).

221012021032 is an abundant number, since it is smaller than the sum of its proper divisors (236021990168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221012021032 is a wasteful number, since it uses less digits than its factorization.

221012021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26698 (or 26694 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221012021032 its reverse (230120210122), we get a palindrome (451132231154).

The spelling of 221012021032 in words is "two hundred twenty-one billion, twelve million, twenty-one thousand, thirty-two".