221023420032 has 64 divisors (see below), whose sum is σ = 587148075360. Its totient is φ = 73667619840.

The previous prime is 221023420031. The next prime is 221023420063. The reversal of 221023420032 is 230024320122.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 221023419990 and 221023420008.

It is not an unprimeable number, because it can be changed into a prime (221023420031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5698818 + ... + 5737470.

Almost surely, 2^221023420032 is an apocalyptic number.

It is an amenable number.

221023420032 is an abundant number, since it is smaller than the sum of its proper divisors (366124655328).

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

221023420032 is a wasteful number, since it uses less digits than its factorization.

221023420032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53561 (or 53549 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 221023420032 its reverse (230024320122), we get a palindrome (451047740154).

The spelling of 221023420032 in words is "two hundred twenty-one billion, twenty-three million, four hundred twenty thousand, thirty-two".