1220202993 has 16 divisors (see below), whose sum is σ = 1651884416. Its totient is φ = 801083520.

The previous prime is 1220202979. The next prime is 1220203027. The reversal of 1220202993 is 3992020221.

It is a happy number.

1220202993 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1220202993 - 2⁵ = 1220202961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220202993.

It is not an unprimeable number, because it can be changed into a prime (1220202293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45021 + ... + 66837.

It is an arithmetic number, because the mean of its divisors is an integer number (103242776).

Almost surely, 2^1220202993 is an apocalyptic number.

It is an amenable number.

1220202993 is a deficient number, since it is larger than the sum of its proper divisors (431681423).

1220202993 is a wasteful number, since it uses less digits than its factorization.

1220202993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22104.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1220202993 is about 34931.4041086241. The cubic root of 1220202993 is about 1068.5889902654.

The spelling of 1220202993 in words is "one billion, two hundred twenty million, two hundred two thousand, nine hundred ninety-three".