23121343015 has 16 divisors (see below), whose sum is σ = 28519319808. Its totient is φ = 17987447296.

The previous prime is 23121343001. The next prime is 23121343061. The reversal of 23121343015 is 51034312132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23121343015 - 2¹¹ = 23121340967 is a prime.

It is a Duffinian number.

It is a congruent 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, 356119 + ... + 416008.

It is an arithmetic number, because the mean of its divisors is an integer number (1782457488).

Almost surely, 2^23121343015 is an apocalyptic number.

23121343015 is a deficient number, since it is larger than the sum of its proper divisors (5397976793).

23121343015 is a wasteful number, since it uses less digits than its factorization.

23121343015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772298.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 23121343015 its reverse (51034312132), we get a palindrome (74155655147).

The spelling of 23121343015 in words is "twenty-three billion, one hundred twenty-one million, three hundred forty-three thousand, fifteen".