1320944121 has 24 divisors (see below), whose sum is σ = 2183897664. Its totient is φ = 753685920.

The previous prime is 1320944111. The next prime is 1320944129. The reversal of 1320944121 is 1214490231.

It is a happy number.

1320944121 is a `hidden beast` number, since 13 + 209 + 441 + 2 + 1 = 666.

It is not a de Polignac number, because 1320944121 - 2¹⁰ = 1320943097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1320944129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27166 + ... + 58136.

It is an arithmetic number, because the mean of its divisors is an integer number (90995736).

Almost surely, 2^1320944121 is an apocalyptic number.

It is an amenable number.

1320944121 is a deficient number, since it is larger than the sum of its proper divisors (862953543).

1320944121 is a wasteful number, since it uses less digits than its factorization.

1320944121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31661 (or 31658 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1320944121 is about 36344.7949643412. The cubic root of 1320944121 is about 1097.2227795245. Note that the first 3 decimals are identical.

The spelling of 1320944121 in words is "one billion, three hundred twenty million, nine hundred forty-four thousand, one hundred twenty-one".