20121231241 has 4 divisors (see below), whose sum is σ = 20549342592. Its totient is φ = 19693119892.

The previous prime is 20121231223. The next prime is 20121231253. The reversal of 20121231241 is 14213212102.

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 20121231241 - 2²⁷ = 19987013513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121231281) 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, 214055605 + ... + 214055698.

It is an arithmetic number, because the mean of its divisors is an integer number (5137335648).

Almost surely, 2^20121231241 is an apocalyptic number.

It is an amenable number.

20121231241 is a deficient number, since it is larger than the sum of its proper divisors (428111351).

20121231241 is an equidigital number, since it uses as much as digits as its factorization.

20121231241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428111350.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20121231241 its reverse (14213212102), we get a palindrome (34334443343).

The spelling of 20121231241 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred forty-one".