42021110 has 16 divisors (see below), whose sum is σ = 80087616. Its totient is φ = 15819648.

The previous prime is 42021073. The next prime is 42021121. The reversal of 42021110 is 1112024.

It is a junction number, because it is equal to n+sod(n) for n = 42021091 and 42021100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123422 + ... + 123761.

It is an arithmetic number, because the mean of its divisors is an integer number (5005476).

Almost surely, 2^42021110 is an apocalyptic number.

42021110 is a deficient number, since it is larger than the sum of its proper divisors (38066506).

42021110 is a wasteful number, since it uses less digits than its factorization.

42021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247207.

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

The square root of 42021110 is about 6482.3691656677. The cubic root of 42021110 is about 347.6608919744.

Adding to 42021110 its reverse (1112024), we get a palindrome (43133134).

The spelling of 42021110 in words is "forty-two million, twenty-one thousand, one hundred ten".