21020022122202 has 24 divisors (see below), whose sum is σ = 45545186876436. Its totient is φ = 7006396254336.

The previous prime is 21020022122201. The next prime is 21020022122221. The reversal of 21020022122202 is 20222122002012.

21020022122202 is a `hidden beast` number, since 21 + 0 + 200 + 221 + 2 + 220 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20075337263601 + 944684858601 = 4480551^2 + 971949^2 .

It is a super-2 number, since 2×21020022122202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21020022122201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22681983 + ... + 23590514.

Almost surely, 2^{21020022122202} is an apocalyptic number.

21020022122202 is an abundant number, since it is smaller than the sum of its proper divisors (24525164754234).

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

21020022122202 is a wasteful number, since it uses less digits than its factorization.

21020022122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46297742 (or 46297739 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21020022122202 its reverse (20222122002012), we get a palindrome (41242144124214).

The spelling of 21020022122202 in words is "twenty-one trillion, twenty billion, twenty-two million, one hundred twenty-two thousand, two hundred two".