121582743361 has 4 divisors (see below), whose sum is σ = 121584031792. Its totient is φ = 121581454932.

The previous prime is 121582743323. The next prime is 121582743371. The reversal of 121582743361 is 163347285121.

It is a happy number.

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: 163347285121 = 613 ⋅266471917.

It is a cyclic number.

It is not a de Polignac number, because 121582743361 - 2²⁹ = 121045872449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121582743371) 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, 490431 + ... + 695476.

It is an arithmetic number, because the mean of its divisors is an integer number (30396007948).

Almost surely, 2^121582743361 is an apocalyptic number.

It is an amenable number.

121582743361 is a deficient number, since it is larger than the sum of its proper divisors (1288431).

121582743361 is a wasteful number, since it uses less digits than its factorization.

121582743361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288430.

The product of its digits is 241920, while the sum is 43.

The spelling of 121582743361 in words is "one hundred twenty-one billion, five hundred eighty-two million, seven hundred forty-three thousand, three hundred sixty-one".