42121013204 has 12 divisors (see below), whose sum is σ = 73775711604. Its totient is φ = 21042238464.

The previous prime is 42121013173. The next prime is 42121013219. The reversal of 42121013204 is 40231012124.

It can be written as a sum of positive squares in 2 ways, for example, as 18727922500 + 23393090704 = 136850^2 + 152948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4561847 + ... + 4571070.

It is an arithmetic number, because the mean of its divisors is an integer number (6147975967).

Almost surely, 2^42121013204 is an apocalyptic number.

It is an amenable number.

42121013204 is a deficient number, since it is larger than the sum of its proper divisors (31654698400).

42121013204 is a wasteful number, since it uses less digits than its factorization.

42121013204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9134074 (or 9134072 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42121013204 its reverse (40231012124), we get a palindrome (82352025328).

The spelling of 42121013204 in words is "forty-two billion, one hundred twenty-one million, thirteen thousand, two hundred four".