42121255351 has 32 divisors (see below), whose sum is σ = 52707594240. Its totient is φ = 32841110016.

The previous prime is 42121255343. The next prime is 42121255373. The reversal of 42121255351 is 15355212124.

It is a cyclic number.

It is not a de Polignac number, because 42121255351 - 2³ = 42121255343 is a prime.

It is a super-2 number, since 2×42121255351² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121258351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372730 + ... + 472408.

It is an arithmetic number, because the mean of its divisors is an integer number (1647112320).

Almost surely, 2^42121255351 is an apocalyptic number.

42121255351 is a deficient number, since it is larger than the sum of its proper divisors (10586338889).

42121255351 is a wasteful number, since it uses less digits than its factorization.

42121255351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99823.

The product of its digits is 12000, while the sum is 31.

Adding to 42121255351 its reverse (15355212124), we get a palindrome (57476467475).

The spelling of 42121255351 in words is "forty-two billion, one hundred twenty-one million, two hundred fifty-five thousand, three hundred fifty-one".