21242233315 has 16 divisors (see below), whose sum is σ = 26214396768. Its totient is φ = 16517303296.

The previous prime is 21242233307. The next prime is 21242233321. The reversal of 21242233315 is 51333224212.

It is a happy number.

It is not a de Polignac number, because 21242233315 - 2³ = 21242233307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346222 + ... + 402931.

It is an arithmetic number, because the mean of its divisors is an integer number (1638399798).

Almost surely, 2^21242233315 is an apocalyptic number.

21242233315 is a deficient number, since it is larger than the sum of its proper divisors (4972163453).

21242233315 is a wasteful number, since it uses less digits than its factorization.

21242233315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749318.

The product of its digits is 8640, while the sum is 28.

Adding to 21242233315 its reverse (51333224212), we get a palindrome (72575457527).

The spelling of 21242233315 in words is "twenty-one billion, two hundred forty-two million, two hundred thirty-three thousand, three hundred fifteen".