1220120198 has 24 divisors (see below), whose sum is σ = 2031644160. Its totient is φ = 549098000.

The previous prime is 1220120179. The next prime is 1220120201. The reversal of 1220120198 is 8910210221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518 + ... + 49401.

It is an arithmetic number, because the mean of its divisors is an integer number (84651840).

Almost surely, 2^1220120198 is an apocalyptic number.

1220120198 is a deficient number, since it is larger than the sum of its proper divisors (811523962).

1220120198 is a wasteful number, since it uses less digits than its factorization.

1220120198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50044 (or 50033 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1220120198 is about 34930.2189801324. The cubic root of 1220120198 is about 1068.5648205638.

The spelling of 1220120198 in words is "one billion, two hundred twenty million, one hundred twenty thousand, one hundred ninety-eight".