121863572317 has 4 divisors (see below), whose sum is σ = 121881598240. Its totient is φ = 121845546396.

The previous prime is 121863572273. The next prime is 121863572339. The reversal of 121863572317 is 713275368121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121863572317 - 2⁷ = 121863572189 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 (121863572387) 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, 9002817 + ... + 9016342.

It is an arithmetic number, because the mean of its divisors is an integer number (30470399560).

Almost surely, 2^121863572317 is an apocalyptic number.

It is an amenable number.

121863572317 is a deficient number, since it is larger than the sum of its proper divisors (18025923).

121863572317 is an equidigital number, since it uses as much as digits as its factorization.

121863572317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18025922.

The product of its digits is 423360, while the sum is 46.

It can be divided in two parts, 12186 and 3572317, that added together give a triangular number (3584503 = T₂₆₇₇).

The spelling of 121863572317 in words is "one hundred twenty-one billion, eight hundred sixty-three million, five hundred seventy-two thousand, three hundred seventeen".