21301221232 has 40 divisors (see below), whose sum is σ = 42355882800. Its totient is φ = 10373985792.

The previous prime is 21301221229. The next prime is 21301221269. The reversal of 21301221232 is 23212210312.

It is a congruent number.

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, 613 + ... + 206404.

It is an arithmetic number, because the mean of its divisors is an integer number (1058897070).

Almost surely, 2^21301221232 is an apocalyptic number.

It is an amenable number.

21301221232 is a deficient number, since it is larger than the sum of its proper divisors (21054661568).

21301221232 is a wasteful number, since it uses less digits than its factorization.

21301221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207193 (or 207187 counting only the distinct ones).

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

Adding to 21301221232 its reverse (23212210312), we get a palindrome (44513431544).

The spelling of 21301221232 in words is "twenty-one billion, three hundred one million, two hundred twenty-one thousand, two hundred thirty-two".