121400305153 has 2 divisors, whose sum is σ = 121400305154. Its totient is φ = 121400305152.

The previous prime is 121400305141. The next prime is 121400305171. The reversal of 121400305153 is 351503004121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83481700624 + 37918604529 = 288932^2 + 194727^2 .

It is a cyclic number.

It is not a de Polignac number, because 121400305153 - 2²⁵ = 121366750721 is a prime.

It is not a weakly prime, because it can be changed into another prime (121400305253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60700152576 + 60700152577.

It is an arithmetic number, because the mean of its divisors is an integer number (60700152577).

Almost surely, 2^121400305153 is an apocalyptic number.

It is an amenable number.

121400305153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400305153 is an equidigital number, since it uses as much as digits as its factorization.

121400305153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 121400305153 its reverse (351503004121), we get a palindrome (472903309274).

The spelling of 121400305153 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, one hundred fifty-three".