21152350531210 has 16 divisors (see below), whose sum is σ = 38074583833416. Its totient is φ = 8460861795328.

The previous prime is 21152350531201. The next prime is 21152350531237. The reversal of 21152350531210 is 1213505325112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20823825535969 + 328524995241 = 4563313^2 + 573171^2 .

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, 8662927 + ... + 10832866.

Almost surely, 2^{21152350531210} is an apocalyptic number.

21152350531210 is a deficient number, since it is larger than the sum of its proper divisors (16922233302206).

21152350531210 is a wasteful number, since it uses less digits than its factorization.

21152350531210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19604297.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 21152350531210 its reverse (1213505325112), we get a palindrome (22365855856322).

The spelling of 21152350531210 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty million, five hundred thirty-one thousand, two hundred ten".