121315264013 has 4 divisors (see below), whose sum is σ = 121315960668. Its totient is φ = 121314567360.

The previous prime is 121315264001. The next prime is 121315264019. The reversal of 121315264013 is 310462513121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2430292804 + 118884971209 = 49298^2 + 344797^2 .

It is a cyclic number.

It is not a de Polignac number, because 121315264013 - 2⁴ = 121315263997 is a prime.

It is a super-3 number, since 3×121315264013³ (a number of 34 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 (121315264019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168083 + ... + 520463.

It is an arithmetic number, because the mean of its divisors is an integer number (30328990167).

Almost surely, 2^121315264013 is an apocalyptic number.

It is an amenable number.

121315264013 is a deficient number, since it is larger than the sum of its proper divisors (696655).

121315264013 is an equidigital number, since it uses as much as digits as its factorization.

121315264013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696654.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 121315264013 its reverse (310462513121), we get a palindrome (431777777134).

The spelling of 121315264013 in words is "one hundred twenty-one billion, three hundred fifteen million, two hundred sixty-four thousand, thirteen".