121355163013 has 4 divisors (see below), whose sum is σ = 138691614880. Its totient is φ = 104018711148.

The previous prime is 121355163011. The next prime is 121355163019. The reversal of 121355163013 is 310361553121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310361553121 = 113 ⋅2746562417.

It is a cyclic number.

It is not a de Polignac number, because 121355163013 - 2¹ = 121355163011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355163011) 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, 8668225923 + ... + 8668225936.

It is an arithmetic number, because the mean of its divisors is an integer number (34672903720).

Almost surely, 2^121355163013 is an apocalyptic number.

It is an amenable number.

121355163013 is a deficient number, since it is larger than the sum of its proper divisors (17336451867).

121355163013 is an equidigital number, since it uses as much as digits as its factorization.

121355163013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17336451866.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 121355163013 in words is "one hundred twenty-one billion, three hundred fifty-five million, one hundred sixty-three thousand, thirteen".