121203445431421 has 8 divisors (see below), whose sum is σ = 121239777639680. Its totient is φ = 121167115988688.

The previous prime is 121203445431401. The next prime is 121203445431487. The reversal of 121203445431421 is 124134544302121.

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 121203445431421 - 2³¹ = 121201297947773 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 (121203445431401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88702615 + ... + 90058651.

It is an arithmetic number, because the mean of its divisors is an integer number (15154972204960).

Almost surely, 2^{121203445431421} is an apocalyptic number.

It is an amenable number.

121203445431421 is a deficient number, since it is larger than the sum of its proper divisors (36332208259).

121203445431421 is a wasteful number, since it uses less digits than its factorization.

121203445431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382763.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 121203445431421 its reverse (124134544302121), we get a palindrome (245337989733542).

The spelling of 121203445431421 in words is "one hundred twenty-one trillion, two hundred three billion, four hundred forty-five million, four hundred thirty-one thousand, four hundred twenty-one".