42234021031 has 2 divisors, whose sum is σ = 42234021032. Its totient is φ = 42234021030.

The previous prime is 42234020989. The next prime is 42234021079. The reversal of 42234021031 is 13012043224.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42234021031 is a prime.

It is a super-2 number, since 2×42234021031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42234020993 and 42234021011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42234024031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21117010515 + 21117010516.

It is an arithmetic number, because the mean of its divisors is an integer number (21117010516).

Almost surely, 2^42234021031 is an apocalyptic number.

42234021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42234021031 is an equidigital number, since it uses as much as digits as its factorization.

42234021031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 42234021031 its reverse (13012043224), we get a palindrome (55246064255).

The spelling of 42234021031 in words is "forty-two billion, two hundred thirty-four million, twenty-one thousand, thirty-one".