1223100001 has 4 divisors (see below), whose sum is σ = 1235210004. Its totient is φ = 1210990000.

The previous prime is 1223099993. The next prime is 1223100017. The reversal of 1223100001 is 1000013221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 646379776 + 576720225 = 25424^2 + 24015^2 .

It is not a de Polignac number, because 1223100001 - 2³ = 1223099993 is a prime.

It is a super-2 number, since 2×1223100001² = 2991947224892400002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223100101) 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 3 ways as a sum of consecutive naturals, for example, 6054850 + ... + 6055051.

It is an arithmetic number, because the mean of its divisors is an integer number (308802501).

Almost surely, 2^1223100001 is an apocalyptic number.

It is an amenable number.

1223100001 is a deficient number, since it is larger than the sum of its proper divisors (12110003).

1223100001 is a wasteful number, since it uses less digits than its factorization.

1223100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110002.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1223100001 is about 34972.8466242026. The cubic root of 1223100001 is about 1069.4340038001.

Adding to 1223100001 its reverse (1000013221), we get a palindrome (2223113222).

The spelling of 1223100001 in words is "one billion, two hundred twenty-three million, one hundred thousand, one".