1231421241 has 4 divisors (see below), whose sum is σ = 1641894992. Its totient is φ = 820947492.

The previous prime is 1231421221. The next prime is 1231421249. The reversal of 1231421241 is 1421241321.

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 not a de Polignac number, because 1231421241 - 2¹³ = 1231413049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231421249) 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, 205236871 + ... + 205236876.

It is an arithmetic number, because the mean of its divisors is an integer number (410473748).

Almost surely, 2^1231421241 is an apocalyptic number.

It is an amenable number.

1231421241 is a deficient number, since it is larger than the sum of its proper divisors (410473751).

1231421241 is an equidigital number, since it uses as much as digits as its factorization.

1231421241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410473750.

The product of its digits is 384, while the sum is 21.

The square root of 1231421241 is about 35091.6121174277. The cubic root of 1231421241 is about 1071.8537873398.

Adding to 1231421241 its reverse (1421241321), we get a palindrome (2652662562).

The spelling of 1231421241 in words is "one billion, two hundred thirty-one million, four hundred twenty-one thousand, two hundred forty-one".