21102122098 has 4 divisors (see below), whose sum is σ = 31653183150. Its totient is φ = 10551061048.

The previous prime is 21102122081. The next prime is 21102122099. The reversal of 21102122098 is 89022120112.

21102122098 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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., 17680223089 + 3421899009 = 132967^2 + 58497^2 .

It is not an unprimeable number, because it can be changed into a prime (21102122099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275530523 + ... + 5275530526.

Almost surely, 2^21102122098 is an apocalyptic number.

21102122098 is a deficient number, since it is larger than the sum of its proper divisors (10551061052).

21102122098 is a wasteful number, since it uses less digits than its factorization.

21102122098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551061051.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 21102122098 in words is "twenty-one billion, one hundred two million, one hundred twenty-two thousand, ninety-eight".