42121101204 has 144 divisors (see below), whose sum is σ = 132204264192. Its totient is φ = 11010456576.

The previous prime is 42121101181. The next prime is 42121101241. The reversal of 42121101204 is 40210112124.

It is a super-2 number, since 2×42121101204² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313297 + ... + 427079.

It is an arithmetic number, because the mean of its divisors is an integer number (918085168).

Almost surely, 2^42121101204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42121101204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66102132096).

42121101204 is an abundant number, since it is smaller than the sum of its proper divisors (90083162988).

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

42121101204 is a wasteful number, since it uses less digits than its factorization.

42121101204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113926 (or 113921 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 42121101204 its reverse (40210112124), we get a palindrome (82331213328).

The spelling of 42121101204 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred four".