21220210000220 has 96 divisors (see below), whose sum is σ = 55931243558400. Its totient is φ = 6569701482240.

The previous prime is 21220210000181. The next prime is 21220210000229. The reversal of 21220210000220 is 2200001202212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21220210000195 and 21220210000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220210000229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46009994 + ... + 46468913.

It is an arithmetic number, because the mean of its divisors is an integer number (582617120400).

Almost surely, 2^{21220210000220} is an apocalyptic number.

21220210000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220210000220 is an abundant number, since it is smaller than the sum of its proper divisors (34711033558180).

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

21220210000220 is a wasteful number, since it uses less digits than its factorization.

21220210000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92479083 (or 92479081 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220210000220 its reverse (2200001202212), we get a palindrome (23420211202432).

The spelling of 21220210000220 in words is "twenty-one trillion, two hundred twenty billion, two hundred ten million, two hundred twenty", and thus it is an aban number.