121312144453 has 2 divisors, whose sum is σ = 121312144454. Its totient is φ = 121312144452.

The previous prime is 121312144417. The next prime is 121312144469. The reversal of 121312144453 is 354441213121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101900131524 + 19412012929 = 319218^2 + 139327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312144453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312144493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656072226 + 60656072227.

It is an arithmetic number, because the mean of its divisors is an integer number (60656072227).

Almost surely, 2^121312144453 is an apocalyptic number.

It is an amenable number.

121312144453 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312144453 is an equidigital number, since it uses as much as digits as its factorization.

121312144453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

Adding to 121312144453 its reverse (354441213121), we get a palindrome (475753357574).

The spelling of 121312144453 in words is "one hundred twenty-one billion, three hundred twelve million, one hundred forty-four thousand, four hundred fifty-three".