42103421031 has 16 divisors (see below), whose sum is σ = 64173991424. Its totient is φ = 24052948704.

The previous prime is 42103421021. The next prime is 42103421033. The reversal of 42103421031 is 13012430124.

It is not a de Polignac number, because 42103421031 - 2¹⁷ = 42103289959 is a prime.

It is a super-2 number, since 2×42103421031² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42103420989 and 42103421007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42103421033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171436 + ... + 337041.

It is an arithmetic number, because the mean of its divisors is an integer number (4010874464).

Almost surely, 2^42103421031 is an apocalyptic number.

42103421031 is a deficient number, since it is larger than the sum of its proper divisors (22070570393).

42103421031 is a wasteful number, since it uses less digits than its factorization.

42103421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512430.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 42103421031 its reverse (13012430124), we get a palindrome (55115851155).

The spelling of 42103421031 in words is "forty-two billion, one hundred three million, four hundred twenty-one thousand, thirty-one".