21111222098 has 8 divisors (see below), whose sum is σ = 33529588092. Its totient is φ = 9934692736.

The previous prime is 21111222091. The next prime is 21111222113. The reversal of 21111222098 is 89022211112.

It can be written as a sum of positive squares in 2 ways, for example, as 20449858009 + 661364089 = 143003^2 + 25717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21111222098.

It is not an unprimeable number, because it can be changed into a prime (21111222091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310459115 + ... + 310459182.

Almost surely, 2^21111222098 is an apocalyptic number.

21111222098 is a deficient number, since it is larger than the sum of its proper divisors (12418365994).

21111222098 is a wasteful number, since it uses less digits than its factorization.

21111222098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620918316.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 21111222098 in words is "twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, ninety-eight".