21022021022111 has 8 divisors (see below), whose sum is σ = 21112993893600. Its totient is φ = 20931156648288.

The previous prime is 21022021022071. The next prime is 21022021022221. The reversal of 21022021022111 is 11122012022012.

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 21022021022111 - 2⁶ = 21022021022047 is a prime.

It is a super-3 number, since 3×21022021022111³ (a number of 41 digits) contains 333 as substring.

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 21022021022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021022711) 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, 26736056 + ... + 27511101.

It is an arithmetic number, because the mean of its divisors is an integer number (2639124236700).

Almost surely, 2^{21022021022111} is an apocalyptic number.

21022021022111 is a deficient number, since it is larger than the sum of its proper divisors (90972871489).

21022021022111 is a wasteful number, since it uses less digits than its factorization.

21022021022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54248833.

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

Adding to 21022021022111 its reverse (11122012022012), we get a palindrome (32144033044123).

Subtracting from 21022021022111 its reverse (11122012022012), we obtain a palindrome (9900009000099).

The spelling of 21022021022111 in words is "twenty-one trillion, twenty-two billion, twenty-one million, twenty-two thousand, one hundred eleven".