21230430411031 has 2 divisors, whose sum is σ = 21230430411032. Its totient is φ = 21230430411030.

The previous prime is 21230430411023. The next prime is 21230430411061. The reversal of 21230430411031 is 13011403403212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21230430411031 - 2³ = 21230430411023 is a prime.

It is a super-2 number, since 2×21230430411031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21230430410987 and 21230430411005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230430411061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615215205515 + 10615215205516.

It is an arithmetic number, because the mean of its divisors is an integer number (10615215205516).

Almost surely, 2^{21230430411031} is an apocalyptic number.

21230430411031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230430411031 is an equidigital number, since it uses as much as digits as its factorization.

21230430411031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21230430411031 its reverse (13011403403212), we get a palindrome (34241833814243).

The spelling of 21230430411031 in words is "twenty-one trillion, two hundred thirty billion, four hundred thirty million, four hundred eleven thousand, thirty-one".