1321011241 has 4 divisors (see below), whose sum is σ = 1441103184. Its totient is φ = 1200919300.

The previous prime is 1321011227. The next prime is 1321011257. The reversal of 1321011241 is 1421101231.

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.

It is a cyclic number.

It is not a de Polignac number, because 1321011241 - 2¹³ = 1321003049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321011541) 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, 60045955 + ... + 60045976.

It is an arithmetic number, because the mean of its divisors is an integer number (360275796).

Almost surely, 2^1321011241 is an apocalyptic number.

1321011241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321011241 is a deficient number, since it is larger than the sum of its proper divisors (120091943).

1321011241 is a wasteful number, since it uses less digits than its factorization.

1321011241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120091942.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1321011241 is about 36345.7183310497. The cubic root of 1321011241 is about 1097.2413632895.

Adding to 1321011241 its reverse (1421101231), we get a palindrome (2742112472).

The spelling of 1321011241 in words is "one billion, three hundred twenty-one million, eleven thousand, two hundred forty-one".