42420356101 has 4 divisors (see below), whose sum is σ = 42422178604. Its totient is φ = 42418533600.

The previous prime is 42420356093. The next prime is 42420356113. The reversal of 42420356101 is 10165302424.

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 24464088100 + 17956268001 = 156410^2 + 134001^2 .

It is a cyclic number.

It is not a de Polignac number, because 42420356101 - 2³ = 42420356093 is a prime.

It is a super-2 number, since 2×42420356101² (a number of 22 digits) contains 22 as substring.

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 42420356101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420356141) 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, 875880 + ... + 923041.

It is an arithmetic number, because the mean of its divisors is an integer number (10605544651).

Almost surely, 2^42420356101 is an apocalyptic number.

It is an amenable number.

42420356101 is a deficient number, since it is larger than the sum of its proper divisors (1822503).

42420356101 is a wasteful number, since it uses less digits than its factorization.

42420356101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822502.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 42420356101 its reverse (10165302424), we get a palindrome (52585658525).

The spelling of 42420356101 in words is "forty-two billion, four hundred twenty million, three hundred fifty-six thousand, one hundred one".