121400305253 has 2 divisors, whose sum is σ = 121400305254. Its totient is φ = 121400305252.

The previous prime is 121400305237. The next prime is 121400305261. The reversal of 121400305253 is 352503004121.

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., 116675530084 + 4724775169 = 341578^2 + 68737^2 .

It is an emirp because it is prime and its reverse (352503004121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121400305253 - 2⁴ = 121400305237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121400305223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60700152626 + 60700152627.

It is an arithmetic number, because the mean of its divisors is an integer number (60700152627).

Almost surely, 2^121400305253 is an apocalyptic number.

It is an amenable number.

121400305253 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400305253 is an equidigital number, since it uses as much as digits as its factorization.

121400305253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 121400305253 its reverse (352503004121), we get a palindrome (473903309374).

The spelling of 121400305253 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, two hundred fifty-three".