121315310533 has 4 divisors (see below), whose sum is σ = 124274220588. Its totient is φ = 118356400480.

The previous prime is 121315310531. The next prime is 121315310561. The reversal of 121315310533 is 335013513121.

It is a happy number.

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 60139224289 + 61176086244 = 245233^2 + 247338^2 .

It is a cyclic number.

It is not a de Polignac number, because 121315310533 - 2¹ = 121315310531 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 (121315310531) 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, 1479454966 + ... + 1479455047.

It is an arithmetic number, because the mean of its divisors is an integer number (31068555147).

Almost surely, 2^121315310533 is an apocalyptic number.

It is an amenable number.

121315310533 is a deficient number, since it is larger than the sum of its proper divisors (2958910055).

121315310533 is an equidigital number, since it uses as much as digits as its factorization.

121315310533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958910054.

The product of its (nonzero) digits is 4050, while the sum is 28.

Adding to 121315310533 its reverse (335013513121), we get a palindrome (456328823654).

The spelling of 121315310533 in words is "one hundred twenty-one billion, three hundred fifteen million, three hundred ten thousand, five hundred thirty-three".