121252342453 has 16 divisors (see below), whose sum is σ = 138247220160. Its totient is φ = 105331161600.

The previous prime is 121252342433. The next prime is 121252342457. The reversal of 121252342453 is 354243252121.

It is a cyclic number.

It is not a de Polignac number, because 121252342453 - 2²¹ = 121250245301 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 (121252342457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1928343 + ... + 1990228.

It is an arithmetic number, because the mean of its divisors is an integer number (8640451260).

Almost surely, 2^121252342453 is an apocalyptic number.

It is an amenable number.

121252342453 is a deficient number, since it is larger than the sum of its proper divisors (16994877707).

121252342453 is a wasteful number, since it uses less digits than its factorization.

121252342453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918708.

The product of its digits is 57600, while the sum is 34.

Adding to 121252342453 its reverse (354243252121), we get a palindrome (475495594574).

The spelling of 121252342453 in words is "one hundred twenty-one billion, two hundred fifty-two million, three hundred forty-two thousand, four hundred fifty-three".