21034334127 has 16 divisors (see below), whose sum is σ = 28182169728. Its totient is φ = 13954826400.

The previous prime is 21034334077. The next prime is 21034334131. The reversal of 21034334127 is 72143343012.

It is not a de Polignac number, because 21034334127 - 2⁶ = 21034334063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21034334094 and 21034334103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034334147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640252 + ... + 672302.

It is an arithmetic number, because the mean of its divisors is an integer number (1761385608).

Almost surely, 2^21034334127 is an apocalyptic number.

21034334127 is a deficient number, since it is larger than the sum of its proper divisors (7147835601).

21034334127 is a wasteful number, since it uses less digits than its factorization.

21034334127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33110.

The product of its (nonzero) digits is 12096, while the sum is 30.

Adding to 21034334127 its reverse (72143343012), we get a palindrome (93177677139).

The spelling of 21034334127 in words is "twenty-one billion, thirty-four million, three hundred thirty-four thousand, one hundred twenty-seven".