42031121022 has 128 divisors (see below), whose sum is σ = 103249036800. Its totient is φ = 12568089600.

The previous prime is 42031120969. The next prime is 42031121039. The reversal of 42031121022 is 22012113024.

It is a happy number.

42031121022 is a `hidden beast` number, since 420 + 3 + 11 + 210 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42031120986 and 42031121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24141072 + ... + 24142812.

It is an arithmetic number, because the mean of its divisors is an integer number (806633100).

Almost surely, 2^42031121022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42031121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51624518400).

42031121022 is an abundant number, since it is smaller than the sum of its proper divisors (61217915778).

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

42031121022 is a wasteful number, since it uses less digits than its factorization.

42031121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42031121022 its reverse (22012113024), we get a palindrome (64043234046).

The spelling of 42031121022 in words is "forty-two billion, thirty-one million, one hundred twenty-one thousand, twenty-two".