42053142121 has 8 divisors (see below), whose sum is σ = 43505728200. Its totient is φ = 40600721280.

The previous prime is 42053142119. The next prime is 42053142127. The reversal of 42053142121 is 12124135024.

It can be written as a sum of positive squares in 4 ways, for example, as 24044844096 + 18008298025 = 155064^2 + 134195^2 .

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 42053142121 - 2¹ = 42053142119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42053142127) 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, 705675 + ... + 762943.

It is an arithmetic number, because the mean of its divisors is an integer number (5438216025).

Almost surely, 2^42053142121 is an apocalyptic number.

It is an amenable number.

42053142121 is a deficient number, since it is larger than the sum of its proper divisors (1452586079).

42053142121 is a wasteful number, since it uses less digits than its factorization.

42053142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82619.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 42053142121 its reverse (12124135024), we get a palindrome (54177277145).

The spelling of 42053142121 in words is "forty-two billion, fifty-three million, one hundred forty-two thousand, one hundred twenty-one".