21152101321430 has 32 divisors (see below), whose sum is σ = 38243545480800. Its totient is φ = 8423119367680.

The previous prime is 21152101321409. The next prime is 21152101321499. The reversal of 21152101321430 is 3412310125112.

It is a super-2 number, since 2×21152101321430² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21152101321430.

It is a congruent number.

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, 44119646 + ... + 44596494.

It is an arithmetic number, because the mean of its divisors is an integer number (1195110796275).

Almost surely, 2^{21152101321430} is an apocalyptic number.

21152101321430 is a deficient number, since it is larger than the sum of its proper divisors (17091444159370).

21152101321430 is a wasteful number, since it uses less digits than its factorization.

21152101321430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496624.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21152101321430 its reverse (3412310125112), we get a palindrome (24564411446542).

The spelling of 21152101321430 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred one million, three hundred twenty-one thousand, four hundred thirty".