220120993 has 2 divisors, whose sum is σ = 220120994. Its totient is φ = 220120992.

The previous prime is 220120973. The next prime is 220121021. The reversal of 220120993 is 399021022.

It is an a-pointer prime, because the next prime (220121021) can be obtained adding 220120993 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197908624 + 22212369 = 14068^2 + 4713^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120993 - 2⁵ = 220120961 is a prime.

It is not a weakly prime, because it can be changed into another prime (220120963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060496 + 110060497.

It is an arithmetic number, because the mean of its divisors is an integer number (110060497).

Almost surely, 2^220120993 is an apocalyptic number.

It is an amenable number.

220120993 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120993 is an equidigital number, since it uses as much as digits as its factorization.

220120993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 220120993 is about 14836.4750867583. The cubic root of 220120993 is about 603.7917218588.

The spelling of 220120993 in words is "two hundred twenty million, one hundred twenty thousand, nine hundred ninety-three".