101231511547 has 2 divisors, whose sum is σ = 101231511548. Its totient is φ = 101231511546.

The previous prime is 101231511497. The next prime is 101231511553. The reversal of 101231511547 is 745115132101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101231511547 - 2¹⁹ = 101230987259 is a prime.

It is not a weakly prime, because it can be changed into another prime (101231511047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615755773 + 50615755774.

It is an arithmetic number, because the mean of its divisors is an integer number (50615755774).

Almost surely, 2^101231511547 is an apocalyptic number.

101231511547 is a deficient number, since it is larger than the sum of its proper divisors (1).

101231511547 is an equidigital number, since it uses as much as digits as its factorization.

101231511547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 101231511547 its reverse (745115132101), we get a palindrome (846346643648).

The spelling of 101231511547 in words is "one hundred one billion, two hundred thirty-one million, five hundred eleven thousand, five hundred forty-seven".