1221910298 has 8 divisors (see below), whose sum is σ = 2094703392. Its totient is φ = 523675836.

The previous prime is 1221910297. The next prime is 1221910303. The reversal of 1221910298 is 8920191221.

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 (1221910297) 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, 43639640 + ... + 43639667.

It is an arithmetic number, because the mean of its divisors is an integer number (261837924).

Almost surely, 2^1221910298 is an apocalyptic number.

1221910298 is a deficient number, since it is larger than the sum of its proper divisors (872793094).

1221910298 is an equidigital number, since it uses as much as digits as its factorization.

1221910298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87279316.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1221910298 is about 34955.8335331887. The cubic root of 1221910298 is about 1069.0871470189.

The spelling of 1221910298 in words is "one billion, two hundred twenty-one million, nine hundred ten thousand, two hundred ninety-eight".