42123211931 has 8 divisors (see below), whose sum is σ = 44343637920. Its totient is φ = 39935201152.

The previous prime is 42123211927. The next prime is 42123211943. The reversal of 42123211931 is 13911232124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42123211931 - 2² = 42123211927 is a prime.

It is a super-2 number, since 2×42123211931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42123211894 and 42123211903.

It is not an unprimeable number, because it can be changed into a prime (42123211901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8101136 + ... + 8106333.

It is an arithmetic number, because the mean of its divisors is an integer number (5542954740).

Almost surely, 2^42123211931 is an apocalyptic number.

42123211931 is a deficient number, since it is larger than the sum of its proper divisors (2220425989).

42123211931 is a wasteful number, since it uses less digits than its factorization.

42123211931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16207605.

The product of its digits is 2592, while the sum is 29.

The spelling of 42123211931 in words is "forty-two billion, one hundred twenty-three million, two hundred eleven thousand, nine hundred thirty-one".