121208573 has 4 divisors (see below), whose sum is σ = 122915808. Its totient is φ = 119501340.

The previous prime is 121208539. The next prime is 121208609. The reversal of 121208573 is 375802121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 375802121 = 19 ⋅19779059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121208573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121208173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853511 + ... + 853652.

It is an arithmetic number, because the mean of its divisors is an integer number (30728952).

Almost surely, 2^121208573 is an apocalyptic number.

It is an amenable number.

121208573 is a deficient number, since it is larger than the sum of its proper divisors (1707235).

121208573 is an equidigital number, since it uses as much as digits as its factorization.

121208573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707234.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 121208573 is about 11009.4765088990. The cubic root of 121208573 is about 494.8927741082.

The spelling of 121208573 in words is "one hundred twenty-one million, two hundred eight thousand, five hundred seventy-three".