42121010 has 8 divisors (see below), whose sum is σ = 75817836. Its totient is φ = 16848400.

The previous prime is 42121007. The next prime is 42121067. The reversal of 42121010 is 1012124.

It can be written as a sum of positive squares in 2 ways, for example, as 42003361 + 117649 = 6481^2 + 343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42120982 and 42121000.

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, 2106041 + ... + 2106060.

Almost surely, 2^42121010 is an apocalyptic number.

42121010 is a deficient number, since it is larger than the sum of its proper divisors (33696826).

42121010 is a wasteful number, since it uses less digits than its factorization.

42121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212108.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 42121010 is about 6490.0701074796. The cubic root of 42121010 is about 347.9361808808.

Adding to 42121010 its reverse (1012124), we get a palindrome (43133134).

The spelling of 42121010 in words is "forty-two million, one hundred twenty-one thousand, ten".