21152350531612 has 12 divisors (see below), whose sum is σ = 37016645789200. Its totient is φ = 10576166020416.

The previous prime is 21152350531603. The next prime is 21152350531621. The reversal of 21152350531612 is 21613505325112.

It is an interprime number because it is at equal distance from previous prime (21152350531603) and next prime (21152350531621).

It is a super-2 number, since 2×21152350531612² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7041673 + ... + 9585919.

Almost surely, 2^{21152350531612} is an apocalyptic number.

It is an amenable number.

21152350531612 is a deficient number, since it is larger than the sum of its proper divisors (15864295257588).

21152350531612 is a wasteful number, since it uses less digits than its factorization.

21152350531612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622700 (or 4622698 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

Adding to 21152350531612 its reverse (21613505325112), we get a palindrome (42765855856724).

The spelling of 21152350531612 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty million, five hundred thirty-one thousand, six hundred twelve".