121102173 has 12 divisors (see below), whose sum is σ = 180957660. Its totient is φ = 77950656.

The previous prime is 121102171. The next prime is 121102243. The reversal of 121102173 is 371201121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48818169 + 72284004 = 6987^2 + 8502^2 .

It is not a de Polignac number, because 121102173 - 2¹ = 121102171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231736 + ... + 232257.

It is an arithmetic number, because the mean of its divisors is an integer number (15079805).

Almost surely, 2^121102173 is an apocalyptic number.

It is an amenable number.

121102173 is a deficient number, since it is larger than the sum of its proper divisors (59855487).

121102173 is a wasteful number, since it uses less digits than its factorization.

121102173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464028 (or 464025 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 121102173 is about 11004.6432472843. The cubic root of 121102173 is about 494.7479218503.

Adding to 121102173 its reverse (371201121), we get a palindrome (492303294).

The spelling of 121102173 in words is "one hundred twenty-one million, one hundred two thousand, one hundred seventy-three".