43111121031 has 12 divisors (see below), whose sum is σ = 67932675720. Its totient is φ = 26127952080.

The previous prime is 43111121023. The next prime is 43111121069. The reversal of 43111121031 is 13012111134.

It is a happy number.

It is not a de Polignac number, because 43111121031 - 2³ = 43111121023 is a prime.

It is a super-2 number, since 2×43111121031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43111120995 and 43111121013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43111121071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217732836 + ... + 217733033.

It is an arithmetic number, because the mean of its divisors is an integer number (5661056310).

Almost surely, 2^43111121031 is an apocalyptic number.

43111121031 is a deficient number, since it is larger than the sum of its proper divisors (24821554689).

43111121031 is a wasteful number, since it uses less digits than its factorization.

43111121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435465886 (or 435465883 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 43111121031 its reverse (13012111134), we get a palindrome (56123232165).

The spelling of 43111121031 in words is "forty-three billion, one hundred eleven million, one hundred twenty-one thousand, thirty-one".