121551112235453 has 16 divisors (see below), whose sum is σ = 122279256422400. Its totient is φ = 120825196978176.

The previous prime is 121551112235429. The next prime is 121551112235533. The reversal of 121551112235453 is 354532211155121.

It is a cyclic number.

It is not a de Polignac number, because 121551112235453 - 2⁶ = 121551112235389 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 121551112235453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121551112235153) 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 15 ways as a sum of consecutive naturals, for example, 1134485501 + ... + 1134592637.

It is an arithmetic number, because the mean of its divisors is an integer number (7642453526400).

Almost surely, 2^{121551112235453} is an apocalyptic number.

It is an amenable number.

121551112235453 is a deficient number, since it is larger than the sum of its proper divisors (728144186947).

121551112235453 is a wasteful number, since it uses less digits than its factorization.

121551112235453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117476.

The product of its digits is 180000, while the sum is 41.

The spelling of 121551112235453 in words is "one hundred twenty-one trillion, five hundred fifty-one billion, one hundred twelve million, two hundred thirty-five thousand, four hundred fifty-three".