121858794041 has 4 divisors (see below), whose sum is σ = 128272414800. Its totient is φ = 115445173284.

The previous prime is 121858794023. The next prime is 121858794047. The reversal of 121858794041 is 140497858121.

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: 140497858121 = 23 ⋅6108602527.

It is a cyclic number.

It is not a de Polignac number, because 121858794041 - 2¹⁴ = 121858777657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121858794047) 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, 3206810351 + ... + 3206810388.

It is an arithmetic number, because the mean of its divisors is an integer number (32068103700).

Almost surely, 2^121858794041 is an apocalyptic number.

It is an amenable number.

121858794041 is a deficient number, since it is larger than the sum of its proper divisors (6413620759).

121858794041 is an equidigital number, since it uses as much as digits as its factorization.

121858794041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413620758.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 121858794041 in words is "one hundred twenty-one billion, eight hundred fifty-eight million, seven hundred ninety-four thousand, forty-one".