1000222111220 has 24 divisors (see below), whose sum is σ = 2121263135208. Its totient is φ = 396127568000.

The previous prime is 1000222111193. The next prime is 1000222111223. The reversal of 1000222111220 is 221112220001.

It can be written as a sum of positive squares in 4 ways, for example, as 212001310096 + 788220801124 = 460436^2 + 887818^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1000222111195 and 1000222111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000222111223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247577711 + ... + 247581750.

It is an arithmetic number, because the mean of its divisors is an integer number (88385963967).

Almost surely, 2^{1000222111220} is an apocalyptic number.

1000222111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000222111220 is an abundant number, since it is smaller than the sum of its proper divisors (1121041023988).

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

1000222111220 is a wasteful number, since it uses less digits than its factorization.

1000222111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495159571 (or 495159569 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1000222111220 its reverse (221112220001), we get a palindrome (1221334331221).

The spelling of 1000222111220 in words is "one trillion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty".