121100430173 has 2 divisors, whose sum is σ = 121100430174. Its totient is φ = 121100430172.

The previous prime is 121100430091. The next prime is 121100430197. The reversal of 121100430173 is 371034001121.

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., 60612962809 + 60487467364 = 246197^2 + 245942^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100430173 - 2¹⁸ = 121100168029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121100430673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550215086 + 60550215087.

It is an arithmetic number, because the mean of its divisors is an integer number (60550215087).

Almost surely, 2^121100430173 is an apocalyptic number.

It is an amenable number.

121100430173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100430173 is an equidigital number, since it uses as much as digits as its factorization.

121100430173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 121100430173 its reverse (371034001121), we get a palindrome (492134431294).

The spelling of 121100430173 in words is "one hundred twenty-one billion, one hundred million, four hundred thirty thousand, one hundred seventy-three".