121042321421 has 8 divisors (see below), whose sum is σ = 144348607104. Its totient is φ = 99239667120.

The previous prime is 121042321397. The next prime is 121042321429. The reversal of 121042321421 is 124123240121.

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

It is a cyclic number.

It is not a de Polignac number, because 121042321421 - 2³⁴ = 103862452237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121042321429) 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 7 ways as a sum of consecutive naturals, for example, 375907670 + ... + 375907991.

It is an arithmetic number, because the mean of its divisors is an integer number (18043575888).

Almost surely, 2^121042321421 is an apocalyptic number.

It is an amenable number.

121042321421 is a deficient number, since it is larger than the sum of its proper divisors (23306285683).

121042321421 is an equidigital number, since it uses as much as digits as its factorization.

121042321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751815691.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121042321421 its reverse (124123240121), we get a palindrome (245165561542).

The spelling of 121042321421 in words is "one hundred twenty-one billion, forty-two million, three hundred twenty-one thousand, four hundred twenty-one".