21101221119 has 8 divisors (see below), whose sum is σ = 30692685312. Its totient is φ = 12788618840.

The previous prime is 21101221103. The next prime is 21101221129. The reversal of 21101221119 is 91112210112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101221119 - 2⁴ = 21101221103 is a prime.

It is a super-2 number, since 2×21101221119² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101221095 and 21101221104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101221129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319715439 + ... + 319715504.

It is an arithmetic number, because the mean of its divisors is an integer number (3836585664).

Almost surely, 2^21101221119 is an apocalyptic number.

21101221119 is a deficient number, since it is larger than the sum of its proper divisors (9591464193).

21101221119 is a wasteful number, since it uses less digits than its factorization.

21101221119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639430957.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 21101221119 in words is "twenty-one billion, one hundred one million, two hundred twenty-one thousand, one hundred nineteen".