243121421413 has 32 divisors (see below), whose sum is σ = 267669642240. Its totient is φ = 219472830720.

The previous prime is 243121421401. The next prime is 243121421423. The reversal of 243121421413 is 314124121342.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-243121421413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121421423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48885795 + ... + 48890767.

It is an arithmetic number, because the mean of its divisors is an integer number (8364676320).

Almost surely, 2^243121421413 is an apocalyptic number.

It is an amenable number.

243121421413 is a deficient number, since it is larger than the sum of its proper divisors (24548220827).

243121421413 is a wasteful number, since it uses less digits than its factorization.

243121421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509.

The product of its digits is 4608, while the sum is 28.

Adding to 243121421413 its reverse (314124121342), we get a palindrome (557245542755).

The spelling of 243121421413 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred twenty-one thousand, four hundred thirteen".