222211111220020 has 72 divisors (see below), whose sum is σ = 525338474723496. Its totient is φ = 78479910803712.

The previous prime is 222211111220017. The next prime is 222211111220023. The reversal of 222211111220020 is 20022111112222.

It is an interprime number because it is at equal distance from previous prime (222211111220017) and next prime (222211111220023).

It can be written as a sum of positive squares in 4 ways, for example, as 144964470564 + 222066146749456 = 380742^2 + 14901884^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222211111220020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211111220023) 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 23 ways as a sum of consecutive naturals, for example, 807667867 + ... + 807942946.

It is an arithmetic number, because the mean of its divisors is an integer number (7296367704493).

Almost surely, 2^{222211111220020} is an apocalyptic number.

222211111220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222211111220020 is an abundant number, since it is smaller than the sum of its proper divisors (303127363503476).

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

222211111220020 is a wasteful number, since it uses less digits than its factorization.

222211111220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615610881 (or 1615610856 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222211111220020 its reverse (20022111112222), we get a palindrome (242233222332242).

The spelling of 222211111220020 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty thousand, twenty".