21021232132232 has 8 divisors (see below), whose sum is σ = 39414810247950. Its totient is φ = 10510616066112.

The previous prime is 21021232132211. The next prime is 21021232132237. The reversal of 21021232132232 is 23223123212012.

It can be written as a sum of positive squares in only one way, i.e., 16723961176036 + 4297270956196 = 4089494^2 + 2072986^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21021232132237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313827008257 + ... + 1313827008272.

Almost surely, 2^{21021232132232} is an apocalyptic number.

It is an amenable number.

21021232132232 is a deficient number, since it is larger than the sum of its proper divisors (18393578115718).

21021232132232 is a wasteful number, since it uses less digits than its factorization.

21021232132232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627654016535 (or 2627654016531 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21021232132232 its reverse (23223123212012), we get a palindrome (44244355344244).

The spelling of 21021232132232 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-two million, one hundred thirty-two thousand, two hundred thirty-two".