222021210020 has 12 divisors (see below), whose sum is σ = 466244541084. Its totient is φ = 88808484000.

The previous prime is 222021210013. The next prime is 222021210023. The reversal of 222021210020 is 20012120222.

It can be written as a sum of positive squares in 2 ways, for example, as 148285066084 + 73736143936 = 385078^2 + 271544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222021209977 and 222021210004.

It is not an unprimeable number, because it can be changed into a prime (222021210023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5550530231 + ... + 5550530270.

It is an arithmetic number, because the mean of its divisors is an integer number (38853711757).

Almost surely, 2^222021210020 is an apocalyptic number.

222021210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222021210020 is an abundant number, since it is smaller than the sum of its proper divisors (244223331064).

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

222021210020 is a wasteful number, since it uses less digits than its factorization.

222021210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101060510 (or 11101060508 counting only the distinct ones).

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

Adding to 222021210020 its reverse (20012120222), we get a palindrome (242033330242).

The spelling of 222021210020 in words is "two hundred twenty-two billion, twenty-one million, two hundred ten thousand, twenty".