21020212020222 has 24 divisors (see below), whose sum is σ = 45544668451776. Its totient is φ = 7006602610656.

The previous prime is 21020212020167. The next prime is 21020212020239. The reversal of 21020212020222 is 22202021202012.

21020212020222 is a `hidden beast` number, since 210 + 2 + 0 + 212 + 0 + 20 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21020212020195 and 21020212020204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10263103 + ... + 12139674.

It is an arithmetic number, because the mean of its divisors is an integer number (1897694518824).

Almost surely, 2^{21020212020222} is an apocalyptic number.

21020212020222 is an abundant number, since it is smaller than the sum of its proper divisors (24524456431554).

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

21020212020222 is a wasteful number, since it uses less digits than its factorization.

21020212020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22454912 (or 22454909 counting only the distinct ones).

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

Adding to 21020212020222 its reverse (22202021202012), we get a palindrome (43222233222234).

The spelling of 21020212020222 in words is "twenty-one trillion, twenty billion, two hundred twelve million, twenty thousand, two hundred twenty-two".