21034510011 has 48 divisors (see below), whose sum is σ = 31660941312. Its totient is φ = 13442544000.

The previous prime is 21034510009. The next prime is 21034510019. The reversal of 21034510011 is 11001543012.

21034510011 is a `hidden beast` number, since 210 + 3 + 451 + 0 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 21034510011 - 2¹ = 21034510009 is a prime.

It is a super-2 number, since 2×21034510011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21034510019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14495836 + ... + 14497286.

It is an arithmetic number, because the mean of its divisors is an integer number (659602944).

Almost surely, 2^21034510011 is an apocalyptic number.

21034510011 is a deficient number, since it is larger than the sum of its proper divisors (10626431301).

21034510011 is a wasteful number, since it uses less digits than its factorization.

21034510011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The spelling of 21034510011 in words is "twenty-one billion, thirty-four million, five hundred ten thousand, eleven".