21152311142244 has 24 divisors (see below), whose sum is σ = 49355551959168. Its totient is φ = 7050747624480.

The previous prime is 21152311142147. The next prime is 21152311142269. The reversal of 21152311142244 is 44224111325112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266054 + ... + 6626274.

It is an arithmetic number, because the mean of its divisors is an integer number (2056481331632).

Almost surely, 2^{21152311142244} is an apocalyptic number.

It is an amenable number.

21152311142244 is an abundant number, since it is smaller than the sum of its proper divisors (28203240816924).

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

21152311142244 is a wasteful number, since it uses less digits than its factorization.

21152311142244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689075 (or 5689073 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

Adding to 21152311142244 its reverse (44224111325112), we get a palindrome (65376422467356).

The spelling of 21152311142244 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred eleven million, one hundred forty-two thousand, two hundred forty-four".