221421651632 has 10 divisors (see below), whose sum is σ = 429004450068. Its totient is φ = 110710825808.

The previous prime is 221421651589. The next prime is 221421651707. The reversal of 221421651632 is 236156124122.

It is a super-2 number, since 2×221421651632² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221421651592 and 221421651601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6919426598 + ... + 6919426629.

Almost surely, 2^221421651632 is an apocalyptic number.

It is an amenable number.

221421651632 is a deficient number, since it is larger than the sum of its proper divisors (207582798436).

221421651632 is a wasteful number, since it uses less digits than its factorization.

221421651632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13838853235 (or 13838853229 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

Adding to 221421651632 its reverse (236156124122), we get a palindrome (457577775754).

The spelling of 221421651632 in words is "two hundred twenty-one billion, four hundred twenty-one million, six hundred fifty-one thousand, six hundred thirty-two".