21122022200220 has 72 divisors (see below), whose sum is σ = 65120464106880. Its totient is φ = 5540202541440.

The previous prime is 21122022200197. The next prime is 21122022200309. The reversal of 21122022200220 is 2200222022112.

21122022200220 is a `hidden beast` number, since 2 + 1 + 1 + 220 + 2 + 220 + 0 + 220 = 666.

It is a super-2 number, since 2×21122022200220² (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 a junction number, because it is equal to n+sod(n) for n = 21122022200193 and 21122022200202.

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 23 ways as a sum of consecutive naturals, for example, 961829740 + ... + 961851699.

Almost surely, 2^{21122022200220} is an apocalyptic number.

21122022200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122022200220 is an abundant number, since it is smaller than the sum of its proper divisors (43998441906660).

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

21122022200220 is a wasteful number, since it uses less digits than its factorization.

21122022200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923681515 (or 1923681510 counting only the distinct ones).

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

Adding to 21122022200220 its reverse (2200222022112), we get a palindrome (23322244222332).

The spelling of 21122022200220 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-two million, two hundred thousand, two hundred twenty".