121323436613 has 8 divisors (see below), whose sum is σ = 121650522360. Its totient is φ = 120996699840.

The previous prime is 121323436607. The next prime is 121323436639. The reversal of 121323436613 is 316634323121.

It can be written as a sum of positive squares in 4 ways, for example, as 4282131844 + 117041304769 = 65438^2 + 342113^2 .

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 121323436613 - 2²² = 121319242309 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 (121323436693) 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, 616631 + ... + 789227.

It is an arithmetic number, because the mean of its divisors is an integer number (15206315295).

Almost surely, 2^121323436613 is an apocalyptic number.

It is an amenable number.

121323436613 is a deficient number, since it is larger than the sum of its proper divisors (327085747).

121323436613 is a wasteful number, since it uses less digits than its factorization.

121323436613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174487.

The product of its digits is 46656, while the sum is 35.

Adding to 121323436613 its reverse (316634323121), we get a palindrome (437957759734).

The spelling of 121323436613 in words is "one hundred twenty-one billion, three hundred twenty-three million, four hundred thirty-six thousand, six hundred thirteen".