21110222201020 has 12 divisors (see below), whose sum is σ = 44331466622184. Its totient is φ = 8444088880400.

The previous prime is 21110222200901. The next prime is 21110222201093. The reversal of 21110222201020 is 2010222201112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110222200985 and 21110222201003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527755555006 + ... + 527755555045.

It is an arithmetic number, because the mean of its divisors is an integer number (3694288885182).

Almost surely, 2^{21110222201020} is an apocalyptic number.

21110222201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110222201020 is an abundant number, since it is smaller than the sum of its proper divisors (23221244421164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110222201020 is a wasteful number, since it uses less digits than its factorization.

21110222201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055511110060 (or 1055511110058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21110222201020 its reverse (2010222201112), we get a palindrome (23120444402132).

The spelling of 21110222201020 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, two hundred one thousand, twenty".