100306135561 has 4 divisors (see below), whose sum is σ = 102638836432. Its totient is φ = 97973434692.

The previous prime is 100306135547. The next prime is 100306135571. The reversal of 100306135561 is 165531603001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165531603001 = 3037 ⋅54504973.

It is a cyclic number.

It is not a de Polignac number, because 100306135561 - 2³⁵ = 65946397193 is a prime.

It is a super-2 number, since 2×100306135561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100306135541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166350371 + ... + 1166350456.

It is an arithmetic number, because the mean of its divisors is an integer number (25659709108).

Almost surely, 2^100306135561 is an apocalyptic number.

It is an amenable number.

100306135561 is a deficient number, since it is larger than the sum of its proper divisors (2332700871).

100306135561 is an equidigital number, since it uses as much as digits as its factorization.

100306135561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332700870.

The product of its (nonzero) digits is 8100, while the sum is 31.

Adding to 100306135561 its reverse (165531603001), we get a palindrome (265837738562).

The spelling of 100306135561 in words is "one hundred billion, three hundred six million, one hundred thirty-five thousand, five hundred sixty-one".