243420121311 has 16 divisors (see below), whose sum is σ = 328347896448. Its totient is φ = 160391844000.

The previous prime is 243420121291. The next prime is 243420121331. The reversal of 243420121311 is 113121024342.

It is an interprime number because it is at equal distance from previous prime (243420121291) and next prime (243420121331).

It is not a de Polignac number, because 243420121311 - 2¹⁰ = 243420120287 is a prime.

It is a super-3 number, since 3×243420121311³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420121331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530461 + ... + 876486.

It is an arithmetic number, because the mean of its divisors is an integer number (20521743528).

Almost surely, 2^243420121311 is an apocalyptic number.

243420121311 is a deficient number, since it is larger than the sum of its proper divisors (84927775137).

243420121311 is a wasteful number, since it uses less digits than its factorization.

243420121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407622.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 243420121311 its reverse (113121024342), we get a palindrome (356541145653).

The spelling of 243420121311 in words is "two hundred forty-three billion, four hundred twenty million, one hundred twenty-one thousand, three hundred eleven".