21500111321034 has 32 divisors (see below), whose sum is σ = 43492292487360. Its totient is φ = 7084725174912.

The previous prime is 21500111320991. The next prime is 21500111321041. The reversal of 21500111321034 is 43012311100512.

It is a super-2 number, since 2×21500111321034² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21500111320995 and 21500111321013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523464 + ... + 6732099.

It is an arithmetic number, because the mean of its divisors is an integer number (1359134140230).

Almost surely, 2^{21500111321034} is an apocalyptic number.

21500111321034 is an abundant number, since it is smaller than the sum of its proper divisors (21992181166326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21500111321034 is a wasteful number, since it uses less digits than its factorization.

21500111321034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8260534.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21500111321034 its reverse (43012311100512), we get a palindrome (64512422421546).

The spelling of 21500111321034 in words is "twenty-one trillion, five hundred billion, one hundred eleven million, three hundred twenty-one thousand, thirty-four".