121210153002173 has 2 divisors, whose sum is σ = 121210153002174. Its totient is φ = 121210153002172.

The previous prime is 121210153002161. The next prime is 121210153002269. The reversal of 121210153002173 is 371200351012121.

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., 95400481378489 + 25809671623684 = 9767317^2 + 5080322^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210153002173 - 2⁶ = 121210153002109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210153005173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605076501086 + 60605076501087.

It is an arithmetic number, because the mean of its divisors is an integer number (60605076501087).

Almost surely, 2^{121210153002173} is an apocalyptic number.

It is an amenable number.

121210153002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210153002173 is an equidigital number, since it uses as much as digits as its factorization.

121210153002173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 121210153002173 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred fifty-three million, two thousand, one hundred seventy-three".