101220541513 has 12 divisors (see below), whose sum is σ = 126803756100. Its totient is φ = 80086581792.

The previous prime is 101220541451. The next prime is 101220541523. The reversal of 101220541513 is 315145022101.

It can be written as a sum of positive squares in 2 ways, for example, as 48001742649 + 53218798864 = 219093^2 + 230692^2 .

It is not a de Polignac number, because 101220541513 - 2³³ = 92630606921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101220541523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79450338 + ... + 79451611.

It is an arithmetic number, because the mean of its divisors is an integer number (10566979675).

Almost surely, 2^101220541513 is an apocalyptic number.

101220541513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

101220541513 is a deficient number, since it is larger than the sum of its proper divisors (25583214587).

101220541513 is a wasteful number, since it uses less digits than its factorization.

101220541513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158901976 (or 158901969 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 101220541513 its reverse (315145022101), we get a palindrome (416365563614).

The spelling of 101220541513 in words is "one hundred one billion, two hundred twenty million, five hundred forty-one thousand, five hundred thirteen".