21013151034544 has 40 divisors (see below), whose sum is σ = 40771399914288. Its totient is φ = 10491502613760.

The previous prime is 21013151034541. The next prime is 21013151034563. The reversal of 21013151034544 is 44543015131012.

It is not an unprimeable number, because it can be changed into a prime (21013151034541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 111590679 + ... + 111778825.

Almost surely, 2^{21013151034544} is an apocalyptic number.

It is an amenable number.

21013151034544 is a deficient number, since it is larger than the sum of its proper divisors (19758248879744).

21013151034544 is a wasteful number, since it uses less digits than its factorization.

21013151034544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198133 (or 198127 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 21013151034544 its reverse (44543015131012), we get a palindrome (65556166165556).

The spelling of 21013151034544 in words is "twenty-one trillion, thirteen billion, one hundred fifty-one million, thirty-four thousand, five hundred forty-four".