100011213541 has 4 divisors (see below), whose sum is σ = 100011851500. Its totient is φ = 100010575584.

The previous prime is 100011213517. The next prime is 100011213553. The reversal of 100011213541 is 145312110001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 145312110001 = 443 ⋅328018307.

It can be written as a sum of positive squares in 2 ways, for example, as 31780549441 + 68230664100 = 178271^2 + 261210^2 .

It is a cyclic number.

It is not a de Polignac number, because 100011213541 - 2⁵ = 100011213509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100011213241) 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, 96985 + ... + 457633.

It is an arithmetic number, because the mean of its divisors is an integer number (25002962875).

Almost surely, 2^100011213541 is an apocalyptic number.

It is an amenable number.

100011213541 is a deficient number, since it is larger than the sum of its proper divisors (637959).

100011213541 is an equidigital number, since it uses as much as digits as its factorization.

100011213541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637958.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 100011213541 its reverse (145312110001), we get a palindrome (245323323542).

The spelling of 100011213541 in words is "one hundred billion, eleven million, two hundred thirteen thousand, five hundred forty-one".