21022221002111 has 8 divisors (see below), whose sum is σ = 24131234179200. Its totient is φ = 17939667512088.

The previous prime is 21022221002093. The next prime is 21022221002203. The reversal of 21022221002111 is 11120012222012.

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

It is not a de Polignac number, because 21022221002111 - 2²² = 21022216807807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022221002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022221002411) 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, 6614920061 + ... + 6614923238.

It is an arithmetic number, because the mean of its divisors is an integer number (3016404272400).

Almost surely, 2^{21022221002111} is an apocalyptic number.

21022221002111 is a deficient number, since it is larger than the sum of its proper divisors (3109013177089).

21022221002111 is a wasteful number, since it uses less digits than its factorization.

21022221002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13229843533.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022221002111 its reverse (11120012222012), we get a palindrome (32142233224123).

The spelling of 21022221002111 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-one million, two thousand, one hundred eleven".