21500120334010 has 16 divisors (see below), whose sum is σ = 38707454441376. Its totient is φ = 8598439724688.

The previous prime is 21500120333999. The next prime is 21500120334107. The reversal of 21500120334010 is 1043302100512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200994972 + ... + 201101911.

It is an arithmetic number, because the mean of its divisors is an integer number (2419215902586).

Almost surely, 2^{21500120334010} is an apocalyptic number.

21500120334010 is a deficient number, since it is larger than the sum of its proper divisors (17207334107366).

21500120334010 is a wasteful number, since it uses less digits than its factorization.

21500120334010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402102237.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21500120334010 its reverse (1043302100512), we get a palindrome (22543422434522).

The spelling of 21500120334010 in words is "twenty-one trillion, five hundred billion, one hundred twenty million, three hundred thirty-four thousand, ten".