21514531021002 has 24 divisors (see below), whose sum is σ = 46615117045536. Its totient is φ = 7171464212136.

The previous prime is 21514531021001. The next prime is 21514531021007. The reversal of 21514531021002 is 20012013541512.

It is a happy number.

21514531021002 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 453 + 102 + 100 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21514531021001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 907198 + ... + 6622089.

It is an arithmetic number, because the mean of its divisors is an integer number (1942296543564).

Almost surely, 2^{21514531021002} is an apocalyptic number.

21514531021002 is an abundant number, since it is smaller than the sum of its proper divisors (25100586024534).

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

21514531021002 is a wasteful number, since it uses less digits than its factorization.

21514531021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688042 (or 7688039 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 21514531021002 its reverse (20012013541512), we get a palindrome (41526544562514).

The spelling of 21514531021002 in words is "twenty-one trillion, five hundred fourteen billion, five hundred thirty-one million, twenty-one thousand, two".