101261320243 has 16 divisors (see below), whose sum is σ = 104330324224. Its totient is φ = 98210296800.

The previous prime is 101261320219. The next prime is 101261320247. The reversal of 101261320243 is 342023162101.

It is a cyclic number.

It is not a de Polignac number, because 101261320243 - 2¹³ = 101261312051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101261320247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18935296 + ... + 18940642.

It is an arithmetic number, because the mean of its divisors is an integer number (6520645264).

Almost surely, 2^101261320243 is an apocalyptic number.

101261320243 is a deficient number, since it is larger than the sum of its proper divisors (3069003981).

101261320243 is a wasteful number, since it uses less digits than its factorization.

101261320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6922.

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

Adding to 101261320243 its reverse (342023162101), we get a palindrome (443284482344).

The spelling of 101261320243 in words is "one hundred one billion, two hundred sixty-one million, three hundred twenty thousand, two hundred forty-three".