21521025541202 has 32 divisors (see below), whose sum is σ = 35256874665600. Its totient is φ = 9770994035200.

The previous prime is 21521025541193. The next prime is 21521025541207. The reversal of 21521025541202 is 20214552012512.

It is not an unprimeable number, because it can be changed into a prime (21521025541207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326137052 + ... + 326203032.

It is an arithmetic number, because the mean of its divisors is an integer number (1101777333300).

Almost surely, 2^{21521025541202} is an apocalyptic number.

21521025541202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21521025541202 is a deficient number, since it is larger than the sum of its proper divisors (13735849124398).

21521025541202 is a wasteful number, since it uses less digits than its factorization.

21521025541202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82882.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 21521025541202 its reverse (20214552012512), we get a palindrome (41735577553714).

The spelling of 21521025541202 in words is "twenty-one trillion, five hundred twenty-one billion, twenty-five million, five hundred forty-one thousand, two hundred two".