121453343004621 has 8 divisors (see below), whose sum is σ = 161937878264800. Its totient is φ = 80968851540432.

The previous prime is 121453343004589. The next prime is 121453343004641. The reversal of 121453343004621 is 126400343354121.

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

It is not a de Polignac number, because 121453343004621 - 2⁵ = 121453343004589 is a prime.

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 121453343004621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121453343004641) 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, 3814075 + ... + 16045368.

It is an arithmetic number, because the mean of its divisors is an integer number (20242234783100).

Almost surely, 2^{121453343004621} is an apocalyptic number.

It is an amenable number.

121453343004621 is a deficient number, since it is larger than the sum of its proper divisors (40484535260179).

121453343004621 is a wasteful number, since it uses less digits than its factorization.

121453343004621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21897995.

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 121453343004621 its reverse (126400343354121), we get a palindrome (247853686358742).

The spelling of 121453343004621 in words is "one hundred twenty-one trillion, four hundred fifty-three billion, three hundred forty-three million, four thousand, six hundred twenty-one".