42021021234 has 32 divisors (see below), whose sum is σ = 87727864320. Its totient is φ = 13402857600.

The previous prime is 42021021191. The next prime is 42021021247. The reversal of 42021021234 is 43212012024.

It is a super-3 number, since 3×42021021234³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42021021234.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1252657 + ... + 1285764.

It is an arithmetic number, because the mean of its divisors is an integer number (2741495760).

Almost surely, 2^42021021234 is an apocalyptic number.

42021021234 is an abundant number, since it is smaller than the sum of its proper divisors (45706843086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42021021234 is a wasteful number, since it uses less digits than its factorization.

42021021234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538546.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 42021021234 its reverse (43212012024), we get a palindrome (85233033258).

The spelling of 42021021234 in words is "forty-two billion, twenty-one million, twenty-one thousand, two hundred thirty-four".