121240141421 has 8 divisors (see below), whose sum is σ = 138618374784. Its totient is φ = 103876461360.

The previous prime is 121240141403. The next prime is 121240141427. The reversal of 121240141421 is 124141042121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121240141421 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 (121240141427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3620465 + ... + 3653798.

It is an arithmetic number, because the mean of its divisors is an integer number (17327296848).

Almost surely, 2^121240141421 is an apocalyptic number.

It is an amenable number.

121240141421 is a deficient number, since it is larger than the sum of its proper divisors (17378233363).

121240141421 is an equidigital number, since it uses as much as digits as its factorization.

121240141421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276651.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121240141421 its reverse (124141042121), we get a palindrome (245381183542).

The spelling of 121240141421 in words is "one hundred twenty-one billion, two hundred forty million, one hundred forty-one thousand, four hundred twenty-one".