1218920122 has 8 divisors (see below), whose sum is σ = 2089577376. Its totient is φ = 522394332.

The previous prime is 1218920107. The next prime is 1218920123. The reversal of 1218920122 is 2210298121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1218920123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43532848 + ... + 43532875.

It is an arithmetic number, because the mean of its divisors is an integer number (261197172).

Almost surely, 2^1218920122 is an apocalyptic number.

1218920122 is a deficient number, since it is larger than the sum of its proper divisors (870657254).

1218920122 is an equidigital number, since it uses as much as digits as its factorization.

1218920122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87065732.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1218920122 is about 34913.0365622929. The cubic root of 1218920122 is about 1068.2143688465.

The spelling of 1218920122 in words is "one billion, two hundred eighteen million, nine hundred twenty thousand, one hundred twenty-two".