121780825683 has 8 divisors (see below), whose sum is σ = 177135746496. Its totient is φ = 73806561000.

The previous prime is 121780825657. The next prime is 121780825729. The reversal of 121780825683 is 386528087121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121780825683 - 2⁵ = 121780825651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121780825633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845163993 + ... + 1845164058.

It is an arithmetic number, because the mean of its divisors is an integer number (22141968312).

Almost surely, 2^121780825683 is an apocalyptic number.

121780825683 is a deficient number, since it is larger than the sum of its proper divisors (55354920813).

121780825683 is a wasteful number, since it uses less digits than its factorization.

121780825683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690328065.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 121780825683 in words is "one hundred twenty-one billion, seven hundred eighty million, eight hundred twenty-five thousand, six hundred eighty-three".