1220323001 has 8 divisors (see below), whose sum is σ = 1228388040. Its totient is φ = 1212277248.

The previous prime is 1220322991. The next prime is 1220323009. The reversal of 1220323001 is 1003230221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 228010000 + 992313001 = 15100^2 + 31501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220323001 - 2¹⁸ = 1220060857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220323009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135305 + ... + 144041.

It is an arithmetic number, because the mean of its divisors is an integer number (153548505).

Almost surely, 2^1220323001 is an apocalyptic number.

It is an amenable number.

1220323001 is a deficient number, since it is larger than the sum of its proper divisors (8065039).

1220323001 is an equidigital number, since it uses as much as digits as its factorization.

1220323001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1220323001 is about 34933.1218330111. The cubic root of 1220323001 is about 1068.6240213284.

Adding to 1220323001 its reverse (1003230221), we get a palindrome (2223553222).

The spelling of 1220323001 in words is "one billion, two hundred twenty million, three hundred twenty-three thousand, one".