21030131047 has 2 divisors, whose sum is σ = 21030131048. Its totient is φ = 21030131046.

The previous prime is 21030130991. The next prime is 21030131053. The reversal of 21030131047 is 74013103012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21030131047 - 2²³ = 21021742439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030101047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515065523 + 10515065524.

It is an arithmetic number, because the mean of its divisors is an integer number (10515065524).

Almost surely, 2^21030131047 is an apocalyptic number.

21030131047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030131047 is an equidigital number, since it uses as much as digits as its factorization.

21030131047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 21030131047 its reverse (74013103012), we get a palindrome (95043234059).

The spelling of 21030131047 in words is "twenty-one billion, thirty million, one hundred thirty-one thousand, forty-seven".