1123100001 has 6 divisors (see below), whose sum is σ = 1622255570. Its totient is φ = 748733328.

The previous prime is 1123099997. The next prime is 1123100057. The reversal of 1123100001 is 1000013211.

It can be written as a sum of positive squares in only one way, i.e., 1102306401 + 20793600 = 33201^2 + 4560^2 .

It is not a de Polignac number, because 1123100001 - 2² = 1123099997 is a prime.

It is a super-2 number, since 2×1123100001² = 2522707224492400002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 124788889 = 1123100001 / (1 + 1 + 2 + 3 + 1 + 0 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123100071) 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 5 ways as a sum of consecutive naturals, for example, 62394436 + ... + 62394453.

Almost surely, 2^1123100001 is an apocalyptic number.

It is an amenable number.

1123100001 is a deficient number, since it is larger than the sum of its proper divisors (499155569).

1123100001 is a wasteful number, since it uses less digits than its factorization.

1123100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124788895 (or 124788892 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1123100001 is about 33512.6841807695. The cubic root of 1123100001 is about 1039.4560768310.

Adding to 1123100001 its reverse (1000013211), we get a palindrome (2123113212).

It can be divided in two parts, 1123 and 100001, that added together give a square (101124 = 318²).

The spelling of 1123100001 in words is "one billion, one hundred twenty-three million, one hundred thousand, one".