101486705031721 has 3 divisors (see below), whose sum is σ = 101486715105783. Its totient is φ = 101486694957660.

The previous prime is 101486705031643. The next prime is 101486705031731. The reversal of 101486705031721 is 127130507684101.

The square root of 101486705031721 is 10074061.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 23345701764121 + 78141003267600 = 4831739^2 + 8839740^2 .

It is a de Polignac number, because none of the positive numbers 2^k-101486705031721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101486705031731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5037031 + ... + 15111091.

It is an arithmetic number, because the mean of its divisors is an integer number (33828905035261).

Almost surely, 2^{101486705031721} is an apocalyptic number.

101486705031721 is the 10074061-st square number.

101486705031721 is the 5037031-st centered octagonal number.

It is an amenable number.

101486705031721 is a deficient number, since it is larger than the sum of its proper divisors (10074062).

101486705031721 is an frugal number, since it uses more digits than its factorization.

101486705031721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20148122 (or 10074061 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 101486705031721 in words is "one hundred one trillion, four hundred eighty-six billion, seven hundred five million, thirty-one thousand, seven hundred twenty-one".