43121301112011 has 4 divisors (see below), whose sum is σ = 57495068149352. Its totient is φ = 28747534074672.

The previous prime is 43121301111989. The next prime is 43121301112013. The reversal of 43121301112011 is 11021110312134.

It is a happy number.

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

It is not a de Polignac number, because 43121301112011 - 2¹⁷ = 43121300980939 is a prime.

It is a super-2 number, since 2×43121301112011² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43121301112013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7186883518666 + ... + 7186883518671.

It is an arithmetic number, because the mean of its divisors is an integer number (14373767037338).

Almost surely, 2^{43121301112011} is an apocalyptic number.

43121301112011 is a deficient number, since it is larger than the sum of its proper divisors (14373767037341).

43121301112011 is a wasteful number, since it uses less digits than its factorization.

43121301112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14373767037340.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 43121301112011 its reverse (11021110312134), we get a palindrome (54142411424145).

The spelling of 43121301112011 in words is "forty-three trillion, one hundred twenty-one billion, three hundred one million, one hundred twelve thousand, eleven".