42106821026 has 8 divisors (see below), whose sum is σ = 63167624604. Its totient is φ = 21050946160.

The previous prime is 42106820999. The next prime is 42106821077. The reversal of 42106821026 is 62012860124.

It can be written as a sum of positive squares in 2 ways, for example, as 41513655001 + 593166025 = 203749^2 + 24355^2 .

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 = 42106820983 and 42106821001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210745 + ... + 1245036.

Almost surely, 2^42106821026 is an apocalyptic number.

42106821026 is a deficient number, since it is larger than the sum of its proper divisors (21060803578).

42106821026 is a wasteful number, since it uses less digits than its factorization.

42106821026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464356.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 42106821026 in words is "forty-two billion, one hundred six million, eight hundred twenty-one thousand, twenty-six".