243121021496 has 16 divisors (see below), whose sum is σ = 462096463200. Its totient is φ = 119895297984.

The previous prime is 243121021489. The next prime is 243121021513. The reversal of 243121021496 is 694120121342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208150976 + ... + 208152143.

It is an arithmetic number, because the mean of its divisors is an integer number (28881028950).

Almost surely, 2^243121021496 is an apocalyptic number.

It is an amenable number.

243121021496 is a deficient number, since it is larger than the sum of its proper divisors (218975441704).

243121021496 is a wasteful number, since it uses less digits than its factorization.

243121021496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416303198 (or 416303194 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 243121021496 in words is "two hundred forty-three billion, one hundred twenty-one million, twenty-one thousand, four hundred ninety-six".