101115121543 has 2 divisors, whose sum is σ = 101115121544. Its totient is φ = 101115121542.

The previous prime is 101115121489. The next prime is 101115121553. The reversal of 101115121543 is 345121511101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101115121543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101115121553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50557560771 + 50557560772.

It is an arithmetic number, because the mean of its divisors is an integer number (50557560772).

Almost surely, 2^101115121543 is an apocalyptic number.

101115121543 is a deficient number, since it is larger than the sum of its proper divisors (1).

101115121543 is an equidigital number, since it uses as much as digits as its factorization.

101115121543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 101115121543 its reverse (345121511101), we get a palindrome (446236632644).

The spelling of 101115121543 in words is "one hundred one billion, one hundred fifteen million, one hundred twenty-one thousand, five hundred forty-three".