21100011098 has 4 divisors (see below), whose sum is σ = 31650016650. Its totient is φ = 10550005548.

The previous prime is 21100011071. The next prime is 21100011143. The reversal of 21100011098 is 89011000112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17928406609 + 3171604489 = 133897^2 + 56317^2 .

It is a super-4 number, since 4×21100011098⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275002773 + ... + 5275002776.

Almost surely, 2^21100011098 is an apocalyptic number.

21100011098 is a deficient number, since it is larger than the sum of its proper divisors (10550005552).

21100011098 is a wasteful number, since it uses less digits than its factorization.

21100011098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550005551.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 21100011098 in words is "twenty-one billion, one hundred million, eleven thousand, ninety-eight".