121231110320153 has 2 divisors, whose sum is σ = 121231110320154. Its totient is φ = 121231110320152.

The previous prime is 121231110320059. The next prime is 121231110320227. The reversal of 121231110320153 is 351023011132121.

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., 74307623914969 + 46923486405184 = 8620187^2 + 6850072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121231110320153 is a prime.

It is not a weakly prime, because it can be changed into another prime (121231110323153) 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, 60615555160076 + 60615555160077.

It is an arithmetic number, because the mean of its divisors is an integer number (60615555160077).

Almost surely, 2^{121231110320153} is an apocalyptic number.

It is an amenable number.

121231110320153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231110320153 is an equidigital number, since it uses as much as digits as its factorization.

121231110320153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 121231110320153 its reverse (351023011132121), we get a palindrome (472254121452274).

The spelling of 121231110320153 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, one hundred ten million, three hundred twenty thousand, one hundred fifty-three".