21320201130434 has 4 divisors (see below), whose sum is σ = 31980301695654. Its totient is φ = 10660100565216.

The previous prime is 21320201130433. The next prime is 21320201130479. The reversal of 21320201130434 is 43403110202312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18738725880625 + 2581475249809 = 4328825^2 + 1606697^2 .

It is a super-2 number, since 2×21320201130434² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21320201130433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330050282607 + ... + 5330050282610.

Almost surely, 2^{21320201130434} is an apocalyptic number.

21320201130434 is a deficient number, since it is larger than the sum of its proper divisors (10660100565220).

21320201130434 is a wasteful number, since it uses less digits than its factorization.

21320201130434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660100565219.

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

Adding to 21320201130434 its reverse (43403110202312), we get a palindrome (64723311332746).

The spelling of 21320201130434 in words is "twenty-one trillion, three hundred twenty billion, two hundred one million, one hundred thirty thousand, four hundred thirty-four".