21011313213234 has 24 divisors (see below), whose sum is σ = 46270815439212. Its totient is φ = 6888955151520.

The previous prime is 21011313213199. The next prime is 21011313213263. The reversal of 21011313213234 is 43231231311012.

21011313213234 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 313 + 21 + 323 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16579172493009 + 4432140720225 = 4071753^2 + 2105265^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21011313213198 and 21011313213207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9567992169 + ... + 9567994364.

Almost surely, 2^{21011313213234} is an apocalyptic number.

21011313213234 is an abundant number, since it is smaller than the sum of its proper divisors (25259502225978).

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

21011313213234 is a wasteful number, since it uses less digits than its factorization.

21011313213234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135986602 (or 19135986599 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 21011313213234 its reverse (43231231311012), we get a palindrome (64242544524246).

The spelling of 21011313213234 in words is "twenty-one trillion, eleven billion, three hundred thirteen million, two hundred thirteen thousand, two hundred thirty-four".