121112240421 has 8 divisors (see below), whose sum is σ = 161575112320. Its totient is φ = 80695431072.

The previous prime is 121112240411. The next prime is 121112240449. The reversal of 121112240421 is 124042211121.

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

It is not a de Polignac number, because 121112240421 - 2⁹ = 121112239909 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 (121112240411) 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, 11509501 + ... + 11520018.

It is an arithmetic number, because the mean of its divisors is an integer number (20196889040).

Almost surely, 2^121112240421 is an apocalyptic number.

It is an amenable number.

121112240421 is a deficient number, since it is larger than the sum of its proper divisors (40462871899).

121112240421 is a wasteful number, since it uses less digits than its factorization.

121112240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23031275.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121112240421 its reverse (124042211121), we get a palindrome (245154451542).

The spelling of 121112240421 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred forty thousand, four hundred twenty-one".