42112121111001 has 12 divisors (see below), whose sum is σ = 61419188504128. Its totient is φ = 27802177043544.

The previous prime is 42112121110999. The next prime is 42112121111003. The reversal of 42112121111001 is 10011112121124.

42112121111001 is a `hidden beast` number, since 421 + 1 + 21 + 211 + 1 + 10 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (42112121110999) and next prime (42112121111003).

It is not a de Polignac number, because 42112121111001 - 2¹ = 42112121110999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42112121111003) 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, 22714196005 + ... + 22714197858.

Almost surely, 2^{42112121111001} is an apocalyptic number.

It is an amenable number.

42112121111001 is a deficient number, since it is larger than the sum of its proper divisors (19307067393127).

42112121111001 is a wasteful number, since it uses less digits than its factorization.

42112121111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45428393972 (or 45428393969 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 42112121111001 its reverse (10011112121124), we get a palindrome (52123233232125).

The spelling of 42112121111001 in words is "forty-two trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, one".