21003134254502 has 16 divisors (see below), whose sum is σ = 33491188551600. Its totient is φ = 9850349570400.

The previous prime is 21003134254481. The next prime is 21003134254523. The reversal of 21003134254502 is 20545243130012.

It is an interprime number because it is at equal distance from previous prime (21003134254481) and next prime (21003134254523).

It is a super-2 number, since 2×21003134254502² (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 7 ways as a sum of consecutive naturals, for example, 2736204377 + ... + 2736212052.

It is an arithmetic number, because the mean of its divisors is an integer number (2093199284475).

Almost surely, 2^{21003134254502} is an apocalyptic number.

21003134254502 is a deficient number, since it is larger than the sum of its proper divisors (12488054297098).

21003134254502 is a wasteful number, since it uses less digits than its factorization.

21003134254502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472416551.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21003134254502 its reverse (20545243130012), we get a palindrome (41548377384514).

The spelling of 21003134254502 in words is "twenty-one trillion, three billion, one hundred thirty-four million, two hundred fifty-four thousand, five hundred two".