121373218 has 4 divisors (see below), whose sum is σ = 182059830. Its totient is φ = 60686608.

The previous prime is 121373201. The next prime is 121373221. The reversal of 121373218 is 812373121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812373121 = 7 ⋅116053303.

It can be written as a sum of positive squares in only one way, i.e., 72471169 + 48902049 = 8513^2 + 6993^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30343303 + ... + 30343306.

Almost surely, 2^121373218 is an apocalyptic number.

121373218 is a deficient number, since it is larger than the sum of its proper divisors (60686612).

121373218 is an equidigital number, since it uses as much as digits as its factorization.

121373218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60686611.

The product of its digits is 2016, while the sum is 28.

The square root of 121373218 is about 11016.9513931940. The cubic root of 121373218 is about 495.1167537404.

The spelling of 121373218 in words is "one hundred twenty-one million, three hundred seventy-three thousand, two hundred eighteen".