21101320140034 has 4 divisors (see below), whose sum is σ = 31651980210054. Its totient is φ = 10550660070016.

The previous prime is 21101320139987. The next prime is 21101320140097. The reversal of 21101320140034 is 43004102310112.

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., 16201405859409 + 4899914280625 = 4025097^2 + 2213575^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21101320139987 and 21101320140014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275330035007 + ... + 5275330035010.

Almost surely, 2^{21101320140034} is an apocalyptic number.

21101320140034 is a deficient number, since it is larger than the sum of its proper divisors (10550660070020).

21101320140034 is a wasteful number, since it uses less digits than its factorization.

21101320140034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550660070019.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21101320140034 its reverse (43004102310112), we get a palindrome (64105422450146).

The spelling of 21101320140034 in words is "twenty-one trillion, one hundred one billion, three hundred twenty million, one hundred forty thousand, thirty-four".