21353430101234 has 64 divisors (see below), whose sum is σ = 42287854913280. Its totient is φ = 7829185351680.

The previous prime is 21353430101231. The next prime is 21353430101299. The reversal of 21353430101234 is 43210103435312.

It is a self number, because there is not a number n which added to its sum of digits gives 21353430101234.

It is not an unprimeable number, because it can be changed into a prime (21353430101231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21283562 + ... + 22264250.

It is an arithmetic number, because the mean of its divisors is an integer number (660747733020).

Almost surely, 2^{21353430101234} is an apocalyptic number.

21353430101234 is a deficient number, since it is larger than the sum of its proper divisors (20934424812046).

21353430101234 is a wasteful number, since it uses less digits than its factorization.

21353430101234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989043.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21353430101234 its reverse (43210103435312), we get a palindrome (64563533536546).

The spelling of 21353430101234 in words is "twenty-one trillion, three hundred fifty-three billion, four hundred thirty million, one hundred one thousand, two hundred thirty-four".