121316552213 has 4 divisors (see below), whose sum is σ = 121393776288. Its totient is φ = 121239328140.

The previous prime is 121316552197. The next prime is 121316552219. The reversal of 121316552213 is 312255613121.

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: 312255613121 = 59 ⋅5292468019.

It is a cyclic number.

It is not a de Polignac number, because 121316552213 - 2⁴ = 121316552197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121316552213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121316552219) 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, 38609681 + ... + 38612822.

It is an arithmetic number, because the mean of its divisors is an integer number (30348444072).

Almost surely, 2^121316552213 is an apocalyptic number.

It is an amenable number.

121316552213 is a deficient number, since it is larger than the sum of its proper divisors (77224075).

121316552213 is an equidigital number, since it uses as much as digits as its factorization.

121316552213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77224074.

The product of its digits is 10800, while the sum is 32.

The spelling of 121316552213 in words is "one hundred twenty-one billion, three hundred sixteen million, five hundred fifty-two thousand, two hundred thirteen".