121425431453 has 2 divisors, whose sum is σ = 121425431454. Its totient is φ = 121425431452.

The previous prime is 121425431419. The next prime is 121425431489. The reversal of 121425431453 is 354134524121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83499037444 + 37926394009 = 288962^2 + 194747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121425431453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121425451453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60712715726 + 60712715727.

It is an arithmetic number, because the mean of its divisors is an integer number (60712715727).

Almost surely, 2^121425431453 is an apocalyptic number.

It is an amenable number.

121425431453 is a deficient number, since it is larger than the sum of its proper divisors (1).

121425431453 is an equidigital number, since it uses as much as digits as its factorization.

121425431453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 35.

Adding to 121425431453 its reverse (354134524121), we get a palindrome (475559955574).

The spelling of 121425431453 in words is "one hundred twenty-one billion, four hundred twenty-five million, four hundred thirty-one thousand, four hundred fifty-three".