121142441423 has 4 divisors (see below), whose sum is σ = 121147172280. Its totient is φ = 121137710568.

The previous prime is 121142441377. The next prime is 121142441471. The reversal of 121142441423 is 324144241121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121142441423 - 2²² = 121138247119 is a prime.

It is a super-3 number, since 3×121142441423³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121142441023) 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, 2326808 + ... + 2378301.

It is an arithmetic number, because the mean of its divisors is an integer number (30286793070).

Almost surely, 2^121142441423 is an apocalyptic number.

121142441423 is a deficient number, since it is larger than the sum of its proper divisors (4730857).

121142441423 is an equidigital number, since it uses as much as digits as its factorization.

121142441423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730856.

The product of its digits is 6144, while the sum is 29.

Adding to 121142441423 its reverse (324144241121), we get a palindrome (445286682544).

The spelling of 121142441423 in words is "one hundred twenty-one billion, one hundred forty-two million, four hundred forty-one thousand, four hundred twenty-three".