130021121 has 4 divisors (see below), whose sum is σ = 133044912. Its totient is φ = 126997332.

The previous prime is 130021109. The next prime is 130021153. The reversal of 130021121 is 121120031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121120031 = 1951 ⋅62081.

It is a cyclic number.

It is not a de Polignac number, because 130021121 - 2²² = 125826817 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 (130021421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511831 + ... + 1511916.

It is an arithmetic number, because the mean of its divisors is an integer number (33261228).

Almost surely, 2^130021121 is an apocalyptic number.

It is an amenable number.

130021121 is a deficient number, since it is larger than the sum of its proper divisors (3023791).

130021121 is an equidigital number, since it uses as much as digits as its factorization.

130021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023790.

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

The square root of 130021121 is about 11402.6804304953. The cubic root of 130021121 is about 506.6071349626.

Adding to 130021121 its reverse (121120031), we get a palindrome (251141152).

The spelling of 130021121 in words is "one hundred thirty million, twenty-one thousand, one hundred twenty-one".