1000222331220 has 72 divisors (see below), whose sum is σ = 3467437419264. Its totient is φ = 228622246848.

The previous prime is 1000222331203. The next prime is 1000222331239. The reversal of 1000222331220 is 221332220001.

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 = 1000222331193 and 1000222331202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 396912364 + ... + 396914883.

Almost surely, 2^{1000222331220} is an apocalyptic number.

1000222331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000222331220 is an abundant number, since it is smaller than the sum of its proper divisors (2467215088044).

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

1000222331220 is a wasteful number, since it uses less digits than its factorization.

1000222331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793827269 (or 793827264 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1000222331220 its reverse (221332220001), we get a palindrome (1221554551221).

The spelling of 1000222331220 in words is "one trillion, two hundred twenty-two million, three hundred thirty-one thousand, two hundred twenty".