42121101021 has 8 divisors (see below), whose sum is σ = 56189514720. Its totient is φ = 28066710672.

The previous prime is 42121101013. The next prime is 42121101041. The reversal of 42121101021 is 12010112124.

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

It is not a de Polignac number, because 42121101021 - 2³ = 42121101013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121101041) 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, 3498826 + ... + 3510843.

It is an arithmetic number, because the mean of its divisors is an integer number (7023689340).

Almost surely, 2^42121101021 is an apocalyptic number.

It is an amenable number.

42121101021 is a deficient number, since it is larger than the sum of its proper divisors (14068413699).

42121101021 is a wasteful number, since it uses less digits than its factorization.

42121101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 42121101021 its reverse (12010112124), we get a palindrome (54131213145).

The spelling of 42121101021 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, twenty-one".