21234152115 has 192 divisors, whose sum is σ = 43055400960. Its totient is φ = 9580032000.

The previous prime is 21234152101. The next prime is 21234152129. The reversal of 21234152115 is 51125143212.

It is a happy number.

21234152115 is a `hidden beast` number, since 2 + 123 + 4 + 1 + 521 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (21234152101) and next prime (21234152129).

It is not a de Polignac number, because 21234152115 - 2⁵ = 21234152083 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 88108395 + ... + 88108635.

It is an arithmetic number, because the mean of its divisors is an integer number (224246880).

Almost surely, 2^21234152115 is an apocalyptic number.

21234152115 is an abundant number, since it is smaller than the sum of its proper divisors (21821248845).

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

21234152115 is a wasteful number, since it uses less digits than its factorization.

21234152115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 463 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 21234152115 its reverse (51125143212), we get a palindrome (72359295327).

The spelling of 21234152115 in words is "twenty-one billion, two hundred thirty-four million, one hundred fifty-two thousand, one hundred fifteen".