121291612441 has 4 divisors (see below), whose sum is σ = 126565160832. Its totient is φ = 116018064052.

The previous prime is 121291612423. The next prime is 121291612447. The reversal of 121291612441 is 144216192121.

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: 144216192121 = 12343 ⋅11684047.

It is a cyclic number.

It is not a de Polignac number, because 121291612441 - 2⁷ = 121291612313 is a prime.

It is a super-3 number, since 3×121291612441³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121291612397 and 121291612406.

It is not an unprimeable number, because it can be changed into a prime (121291612447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636774161 + ... + 2636774206.

It is an arithmetic number, because the mean of its divisors is an integer number (31641290208).

Almost surely, 2^121291612441 is an apocalyptic number.

It is an amenable number.

121291612441 is a deficient number, since it is larger than the sum of its proper divisors (5273548391).

121291612441 is an equidigital number, since it uses as much as digits as its factorization.

121291612441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273548390.

The product of its digits is 6912, while the sum is 34.

The spelling of 121291612441 in words is "one hundred twenty-one billion, two hundred ninety-one million, six hundred twelve thousand, four hundred forty-one".