21365334041252 has 12 divisors (see below), whose sum is σ = 37390060699740. Its totient is φ = 10682459555616.

The previous prime is 21365334041237. The next prime is 21365334041263. The reversal of 21365334041252 is 25214043356312.

It can be written as a sum of positive squares in 2 ways, for example, as 19964936349796 + 1400397691456 = 4468214^2 + 1183384^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51634427 + ... + 52046562.

It is an arithmetic number, because the mean of its divisors is an integer number (3115838391645).

Almost surely, 2^{21365334041252} is an apocalyptic number.

It is an amenable number.

21365334041252 is a deficient number, since it is larger than the sum of its proper divisors (16024726658488).

21365334041252 is a wasteful number, since it uses less digits than its factorization.

21365334041252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103732510 (or 103732508 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 21365334041252 its reverse (25214043356312), we get a palindrome (46579377397564).

The spelling of 21365334041252 in words is "twenty-one trillion, three hundred sixty-five billion, three hundred thirty-four million, forty-one thousand, two hundred fifty-two".