101231523521 has 8 divisors (see below), whose sum is σ = 101410655424. Its totient is φ = 101052539280.

The previous prime is 101231523493. The next prime is 101231523571. The reversal of 101231523521 is 125325132101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101231523521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101231523571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1383311 + ... + 1454651.

It is an arithmetic number, because the mean of its divisors is an integer number (12676331928).

Almost surely, 2^101231523521 is an apocalyptic number.

It is an amenable number.

101231523521 is a deficient number, since it is larger than the sum of its proper divisors (179131903).

101231523521 is an equidigital number, since it uses as much as digits as its factorization.

101231523521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73831.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 101231523521 its reverse (125325132101), we get a palindrome (226556655622).

The spelling of 101231523521 in words is "one hundred one billion, two hundred thirty-one million, five hundred twenty-three thousand, five hundred twenty-one".