121401344203403 has 24 divisors (see below), whose sum is σ = 134054541337920. Its totient is φ = 109857919248000.

The previous prime is 121401344203387. The next prime is 121401344203417. The reversal of 121401344203403 is 304302443104121.

It is not a de Polignac number, because 121401344203403 - 2⁴ = 121401344203387 is a prime.

It is a super-3 number, since 3×121401344203403³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121401344203403.

It is not an unprimeable number, because it can be changed into a prime (121401344203603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69614303 + ... + 71336903.

It is an arithmetic number, because the mean of its divisors is an integer number (5585605889080).

Almost surely, 2^{121401344203403} is an apocalyptic number.

121401344203403 is a deficient number, since it is larger than the sum of its proper divisors (12653197134517).

121401344203403 is a wasteful number, since it uses less digits than its factorization.

121401344203403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725299 (or 1725288 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 121401344203403 its reverse (304302443104121), we get a palindrome (425703787307524).

The spelling of 121401344203403 in words is "one hundred twenty-one trillion, four hundred one billion, three hundred forty-four million, two hundred three thousand, four hundred three".