42111100312031 has 4 divisors (see below), whose sum is σ = 42271218564432. Its totient is φ = 41950982059632.

The previous prime is 42111100311967. The next prime is 42111100312067. The reversal of 42111100312031 is 13021300111124.

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 42111100312031 - 2⁶ = 42111100311967 is a prime.

It is a super-2 number, since 2×42111100312031² (a number of 28 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 = 42111100311994 and 42111100312012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42111100312091) 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, 80059125806 + ... + 80059126331.

It is an arithmetic number, because the mean of its divisors is an integer number (10567804641108).

Almost surely, 2^{42111100312031} is an apocalyptic number.

42111100312031 is a deficient number, since it is larger than the sum of its proper divisors (160118252401).

42111100312031 is a wasteful number, since it uses less digits than its factorization.

42111100312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160118252400.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 42111100312031 its reverse (13021300111124), we get a palindrome (55132400423155).

The spelling of 42111100312031 in words is "forty-two trillion, one hundred eleven billion, one hundred million, three hundred twelve thousand, thirty-one".