13123461500221 has 8 divisors (see below), whose sum is σ = 13207144757240. Its totient is φ = 13039779437568.

The previous prime is 13123461500207. The next prime is 13123461500239. The reversal of 13123461500221 is 12200516432131.

It can be written as a sum of positive squares in 4 ways, for example, as 2982739697721 + 10140721802500 = 1727061^2 + 3184450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13123461500221 - 2⁵ = 13123461500189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123461500251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35014405 + ... + 35387221.

It is an arithmetic number, because the mean of its divisors is an integer number (1650893094655).

Almost surely, 2^{13123461500221} is an apocalyptic number.

It is an amenable number.

13123461500221 is a deficient number, since it is larger than the sum of its proper divisors (83683257019).

13123461500221 is a wasteful number, since it uses less digits than its factorization.

13123461500221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597183.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 13123461500221 its reverse (12200516432131), we get a palindrome (25323977932352).

The spelling of 13123461500221 in words is "thirteen trillion, one hundred twenty-three billion, four hundred sixty-one million, five hundred thousand, two hundred twenty-one".