1123020001 has 2 divisors, whose sum is σ = 1123020002. Its totient is φ = 1123020000.

The previous prime is 1123019999. The next prime is 1123020077. The reversal of 1123020001 is 1000203211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1094021776 + 28998225 = 33076^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123020001 - 2¹ = 1123019999 is a prime.

It is a super-2 number, since 2×1123020001² = 2522347845292080002, which contains 22 as substring.

Together with 1123019999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1123020001.

It is not a weakly prime, because it can be changed into another prime (1123020091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561510000 + 561510001.

It is an arithmetic number, because the mean of its divisors is an integer number (561510001).

Almost surely, 2^1123020001 is an apocalyptic number.

It is an amenable number.

1123020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123020001 is an equidigital number, since it uses as much as digits as its factorization.

1123020001 is an evil number, because the sum of its binary digits is even.

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

The square root of 1123020001 is about 33511.4905815901. The cubic root of 1123020001 is about 1039.4313956033.

Adding to 1123020001 its reverse (1000203211), we get a palindrome (2123223212).

The spelling of 1123020001 in words is "one billion, one hundred twenty-three million, twenty thousand, one".