221020222132 has 12 divisors (see below), whose sum is σ = 386800197700. Its totient is φ = 110505879936.

The previous prime is 221020222123. The next prime is 221020222153. The reversal of 221020222132 is 231222020122.

It can be written as a sum of positive squares in 2 ways, for example, as 118464002596 + 102556219536 = 344186^2 + 320244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938763 + ... + 1150354.

Almost surely, 2^221020222132 is an apocalyptic number.

It is an amenable number.

221020222132 is a deficient number, since it is larger than the sum of its proper divisors (165779975568).

221020222132 is a wasteful number, since it uses less digits than its factorization.

221020222132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115570 (or 2115568 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221020222132 its reverse (231222020122), we get a palindrome (452242242254).

The spelling of 221020222132 in words is "two hundred twenty-one billion, twenty million, two hundred twenty-two thousand, one hundred thirty-two".