42101121 has 8 divisors (see below), whose sum is σ = 56165824. Its totient is φ = 28051920.

The previous prime is 42101119. The next prime is 42101149. The reversal of 42101121 is 12110124.

It is a happy number.

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

It is not a de Polignac number, because 42101121 - 2¹ = 42101119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42101097 and 42101106.

It is not an unprimeable number, because it can be changed into a prime (42101021) 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, 6231 + ... + 11091.

It is an arithmetic number, because the mean of its divisors is an integer number (7020728).

Almost surely, 2^42101121 is an apocalyptic number.

It is an amenable number.

42101121 is a deficient number, since it is larger than the sum of its proper divisors (14064703).

42101121 is a wasteful number, since it uses less digits than its factorization.

42101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 42101121 is about 6488.5376626787. The cubic root of 42101121 is about 347.8814085935.

Adding to 42101121 its reverse (12110124), we get a palindrome (54211245).

The spelling of 42101121 in words is "forty-two million, one hundred one thousand, one hundred twenty-one".