101511442397 has 4 divisors (see below), whose sum is σ = 101635086876. Its totient is φ = 101387797920.

The previous prime is 101511442369. The next prime is 101511442447. The reversal of 101511442397 is 793244115101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793244115101 = 463 ⋅1713270227.

It can be written as a sum of positive squares in 2 ways, for example, as 46010679001 + 55500763396 = 214501^2 + 235586^2 .

It is a cyclic number.

It is not a de Polignac number, because 101511442397 - 2¹⁶ = 101511376861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101511442397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101511442337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61821008 + ... + 61822649.

It is an arithmetic number, because the mean of its divisors is an integer number (25408771719).

Almost surely, 2^101511442397 is an apocalyptic number.

It is an amenable number.

101511442397 is a deficient number, since it is larger than the sum of its proper divisors (123644479).

101511442397 is an equidigital number, since it uses as much as digits as its factorization.

101511442397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123644478.

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 101511442397 its reverse (793244115101), we get a palindrome (894755557498).

The spelling of 101511442397 in words is "one hundred one billion, five hundred eleven million, four hundred forty-two thousand, three hundred ninety-seven".