21134110621 has 12 divisors (see below), whose sum is σ = 22896462240. Its totient is φ = 19498524240.

The previous prime is 21134110619. The next prime is 21134110703. The reversal of 21134110621 is 12601143112.

It is not a de Polignac number, because 21134110621 - 2¹ = 21134110619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21134110592 and 21134110601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134110601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313926 + ... + 375256.

It is an arithmetic number, because the mean of its divisors is an integer number (1908038520).

Almost surely, 2^21134110621 is an apocalyptic number.

It is an amenable number.

21134110621 is a deficient number, since it is larger than the sum of its proper divisors (1762351619).

21134110621 is a wasteful number, since it uses less digits than its factorization.

21134110621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63396 (or 63383 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21134110621 its reverse (12601143112), we get a palindrome (33735253733).

The spelling of 21134110621 in words is "twenty-one billion, one hundred thirty-four million, one hundred ten thousand, six hundred twenty-one".