221432230403021 has 8 divisors (see below), whose sum is σ = 249354769721088. Its totient is φ = 194808413844000.

The previous prime is 221432230403011. The next prime is 221432230403051. The reversal of 221432230403021 is 120304032234122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221432230403021 - 2³⁴ = 221415050533837 is a prime.

It is a super-2 number, since 2×221432230403021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221432230403011) 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, 324680689400 + ... + 324680690081.

It is an arithmetic number, because the mean of its divisors is an integer number (31169346215136).

Almost surely, 2^{221432230403021} is an apocalyptic number.

It is an amenable number.

221432230403021 is a deficient number, since it is larger than the sum of its proper divisors (27922539318067).

221432230403021 is a wasteful number, since it uses less digits than its factorization.

221432230403021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649361379523.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 221432230403021 its reverse (120304032234122), we get a palindrome (341736262637143).

The spelling of 221432230403021 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred thirty million, four hundred three thousand, twenty-one".