21234201352 has 48 divisors (see below), whose sum is σ = 49877050860. Its totient is φ = 8400341376.

The previous prime is 21234201349. The next prime is 21234201413. The reversal of 21234201352 is 25310243212.

It can be written as a sum of positive squares in 2 ways, for example, as 20548075716 + 686125636 = 143346^2 + 26194^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2078323 + ... + 2088514.

Almost surely, 2^21234201352 is an apocalyptic number.

It is an amenable number.

21234201352 is an abundant number, since it is smaller than the sum of its proper divisors (28642849508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234201352 is a wasteful number, since it uses less digits than its factorization.

21234201352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166870 (or 4166859 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21234201352 its reverse (25310243212), we get a palindrome (46544444564).

The spelling of 21234201352 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred fifty-two".