121231031301013 has 4 divisors (see below), whose sum is σ = 121231755975340. Its totient is φ = 121230306626688.

The previous prime is 121231031300999. The next prime is 121231031301043. The reversal of 121231031301013 is 310103130132121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76597381472049 + 44633649828964 = 8751993^2 + 6680842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121231031301013 is a prime.

It is a super-3 number, since 3×121231031301013³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231031301043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362086170 + ... + 362420827.

It is an arithmetic number, because the mean of its divisors is an integer number (30307938993835).

Almost surely, 2^{121231031301013} is an apocalyptic number.

It is an amenable number.

121231031301013 is a deficient number, since it is larger than the sum of its proper divisors (724674327).

121231031301013 is an equidigital number, since it uses as much as digits as its factorization.

121231031301013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724674326.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 121231031301013 its reverse (310103130132121), we get a palindrome (431334161433134).

The spelling of 121231031301013 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, thirty-one million, three hundred one thousand, thirteen".