21101222019 has 8 divisors (see below), whose sum is σ = 28136480512. Its totient is φ = 14066722440.

The previous prime is 21101221993. The next prime is 21101222057. The reversal of 21101222019 is 91022210112.

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

It is not a de Polignac number, because 21101222019 - 2⁷ = 21101221891 is a prime.

It is a super-2 number, since 2×21101222019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101221986 and 21101222004.

It is not an unprimeable number, because it can be changed into a prime (21101222119) 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 in 7 ways as a sum of consecutive naturals, for example, 121327 + ... + 238584.

It is an arithmetic number, because the mean of its divisors is an integer number (3517060064).

Almost surely, 2^21101222019 is an apocalyptic number.

21101222019 is a deficient number, since it is larger than the sum of its proper divisors (7035258493).

21101222019 is a wasteful number, since it uses less digits than its factorization.

21101222019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379457.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 21101222019 in words is "twenty-one billion, one hundred one million, two hundred twenty-two thousand, nineteen".