42121034004 has 48 divisors (see below), whose sum is σ = 112792780800. Its totient is φ = 11984221536.

The previous prime is 42121033993. The next prime is 42121034027. The reversal of 42121034004 is 40043012124.

It is a super-2 number, since 2×42121034004² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028964 + ... + 1069115.

It is an arithmetic number, because the mean of its divisors is an integer number (2349849600).

Almost surely, 2^42121034004 is an apocalyptic number.

It is an amenable number.

42121034004 is an abundant number, since it is smaller than the sum of its proper divisors (70671746796).

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

42121034004 is a wasteful number, since it uses less digits than its factorization.

42121034004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098332 (or 2098330 counting only the distinct ones).

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

Adding to 42121034004 its reverse (40043012124), we get a palindrome (82164046128).

The spelling of 42121034004 in words is "forty-two billion, one hundred twenty-one million, thirty-four thousand, four".