1300021123 has 4 divisors (see below), whose sum is σ = 1302829408. Its totient is φ = 1297212840.

The previous prime is 1300021103. The next prime is 1300021133. The reversal of 1300021123 is 3211200031.

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

It is a cyclic number.

It is not a de Polignac number, because 1300021123 - 2¹⁷ = 1299890051 is a prime.

It is a super-2 number, since 2×1300021123² = 3380109840492362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1300021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403448 + ... + 1404373.

It is an arithmetic number, because the mean of its divisors is an integer number (325707352).

Almost surely, 2^1300021123 is an apocalyptic number.

1300021123 is a deficient number, since it is larger than the sum of its proper divisors (2808285).

1300021123 is an equidigital number, since it uses as much as digits as its factorization.

1300021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808284.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1300021123 is about 36055.8056767561. The cubic root of 1300021123 is about 1091.3987941809.

Adding to 1300021123 its reverse (3211200031), we get a palindrome (4511221154).

The spelling of 1300021123 in words is "one billion, three hundred million, twenty-one thousand, one hundred twenty-three".