21500451003011 has 16 divisors (see below), whose sum is σ = 23392819660800. Its totient is φ = 19685885803200.

The previous prime is 21500451002981. The next prime is 21500451003023. The reversal of 21500451003011 is 11030015400512.

It is not a de Polignac number, because 21500451003011 - 2²² = 21500446808707 is a prime.

It is a super-2 number, since 2×21500451003011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21500451003091) 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, 23535551 + ... + 24432008.

It is an arithmetic number, because the mean of its divisors is an integer number (1462051228800).

Almost surely, 2^{21500451003011} is an apocalyptic number.

21500451003011 is a deficient number, since it is larger than the sum of its proper divisors (1892368657789).

21500451003011 is a wasteful number, since it uses less digits than its factorization.

21500451003011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47968370.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 21500451003011 its reverse (11030015400512), we get a palindrome (32530466403523).

The spelling of 21500451003011 in words is "twenty-one trillion, five hundred billion, four hundred fifty-one million, three thousand, eleven".