243020001011 has 4 divisors (see below), whose sum is σ = 255810527400. Its totient is φ = 230229474624.

The previous prime is 243020000999. The next prime is 243020001031. The reversal of 243020001011 is 110100020342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243020001011 - 2¹⁰ = 243019999987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243020001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6395263166 + ... + 6395263203.

It is an arithmetic number, because the mean of its divisors is an integer number (63952631850).

Almost surely, 2^243020001011 is an apocalyptic number.

243020001011 is a deficient number, since it is larger than the sum of its proper divisors (12790526389).

243020001011 is a wasteful number, since it uses less digits than its factorization.

243020001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12790526388.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 243020001011 its reverse (110100020342), we get a palindrome (353120021353).

The spelling of 243020001011 in words is "two hundred forty-three billion, twenty million, one thousand, eleven".