1300021121 has 16 divisors (see below), whose sum is σ = 1494650880. Its totient is φ = 1107643200.

The previous prime is 1300021103. The next prime is 1300021133. The reversal of 1300021121 is 1211200031.

It is a cyclic number.

It is not a de Polignac number, because 1300021121 - 2¹⁰ = 1300020097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1300021621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128896 + ... + 1130046.

It is an arithmetic number, because the mean of its divisors is an integer number (93415680).

Almost surely, 2^1300021121 is an apocalyptic number.

It is an amenable number.

1300021121 is a deficient number, since it is larger than the sum of its proper divisors (194629759).

1300021121 is a wasteful number, since it uses less digits than its factorization.

1300021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1300021121 is about 36055.8056490214. The cubic root of 1300021121 is about 1091.3987936212.

Adding to 1300021121 its reverse (1211200031), we get a palindrome (2511221152).

The spelling of 1300021121 in words is "one billion, three hundred million, twenty-one thousand, one hundred twenty-one".