21203221132 has 24 divisors (see below), whose sum is σ = 37839253536. Its totient is φ = 10393746048.

The previous prime is 21203221103. The next prime is 21203221159. The reversal of 21203221132 is 23112230212.

It is a super-2 number, since 2×21203221132² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168643 + ... + 266170.

It is an arithmetic number, because the mean of its divisors is an integer number (1576635564).

Almost surely, 2^21203221132 is an apocalyptic number.

It is an amenable number.

21203221132 is a deficient number, since it is larger than the sum of its proper divisors (16636032404).

21203221132 is a wasteful number, since it uses less digits than its factorization.

21203221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435057 (or 435055 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21203221132 its reverse (23112230212), we get a palindrome (44315451344).

The spelling of 21203221132 in words is "twenty-one billion, two hundred three million, two hundred twenty-one thousand, one hundred thirty-two".