21102221022211 has 8 divisors (see below), whose sum is σ = 24129430848864. Its totient is φ = 18078162901440.

The previous prime is 21102221022151. The next prime is 21102221022221. The reversal of 21102221022211 is 11222012220112.

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 21102221022211 - 2³³ = 21093631087619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102221022221) 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, 787912120 + ... + 787938901.

It is an arithmetic number, because the mean of its divisors is an integer number (3016178856108).

Almost surely, 2^{21102221022211} is an apocalyptic number.

21102221022211 is a deficient number, since it is larger than the sum of its proper divisors (3027209826653).

21102221022211 is a wasteful number, since it uses less digits than its factorization.

21102221022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575852941.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21102221022211 its reverse (11222012220112), we get a palindrome (32324233242323).

The spelling of 21102221022211 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".