21343134202 has 16 divisors (see below), whose sum is σ = 34601849352. Its totient is φ = 9815112000.

The previous prime is 21343134181. The next prime is 21343134203. The reversal of 21343134202 is 20243134312.

It can be written as a sum of positive squares in 4 ways, for example, as 9846791361 + 11496342841 = 99231^2 + 107221^2 .

It is not an unprimeable number, because it can be changed into a prime (21343134203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474549 + ... + 1488952.

Almost surely, 2^21343134202 is an apocalyptic number.

21343134202 is a deficient number, since it is larger than the sum of its proper divisors (13258715150).

21343134202 is a wasteful number, since it uses less digits than its factorization.

21343134202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963793.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21343134202 its reverse (20243134312), we get a palindrome (41586268514).

The spelling of 21343134202 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-four thousand, two hundred two".