1220120993 has 16 divisors (see below), whose sum is σ = 1505024640. Its totient is φ = 963225216.

The previous prime is 1220120989. The next prime is 1220121017. The reversal of 1220120993 is 3990210221.

It is a cyclic number.

It is not a de Polignac number, because 1220120993 - 2² = 1220120989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220120903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26918 + ... + 56256.

It is an arithmetic number, because the mean of its divisors is an integer number (94064040).

Almost surely, 2^1220120993 is an apocalyptic number.

1220120993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220120993 is a deficient number, since it is larger than the sum of its proper divisors (284903647).

1220120993 is a wasteful number, since it uses less digits than its factorization.

1220120993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29816.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1220120993 is about 34930.2303599618. The cubic root of 1220120993 is about 1068.5650526472.

The spelling of 1220120993 in words is "one billion, two hundred twenty million, one hundred twenty thousand, nine hundred ninety-three".