42102321101 has 4 divisors (see below), whose sum is σ = 42896704572. Its totient is φ = 41307937632.

The previous prime is 42102321083. The next prime is 42102321109. The reversal of 42102321101 is 10112320124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15037135876 + 27065185225 = 122626^2 + 164515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42102321101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42102321101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42102321109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397191656 + ... + 397191761.

It is an arithmetic number, because the mean of its divisors is an integer number (10724176143).

Almost surely, 2^42102321101 is an apocalyptic number.

It is an amenable number.

42102321101 is a deficient number, since it is larger than the sum of its proper divisors (794383471).

42102321101 is an equidigital number, since it uses as much as digits as its factorization.

42102321101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794383470.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 42102321101 its reverse (10112320124), we get a palindrome (52214641225).

The spelling of 42102321101 in words is "forty-two billion, one hundred two million, three hundred twenty-one thousand, one hundred one".