1200022222120 has 64 divisors (see below), whose sum is σ = 2718023513040. Its totient is φ = 476823552000.

The previous prime is 1200022222079. The next prime is 1200022222127. The reversal of 1200022222120 is 212222200021.

It can be written as a sum of positive squares in 8 ways, for example, as 1185254625636 + 14767596484 = 1088694^2 + 121522^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1200022222094 and 1200022222103.

It is not an unprimeable number, because it can be changed into a prime (1200022222127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3710424 + ... + 4020856.

Almost surely, 2^{1200022222120} is an apocalyptic number.

1200022222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200022222120 is an abundant number, since it is smaller than the sum of its proper divisors (1518001290920).

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

1200022222120 is a wasteful number, since it uses less digits than its factorization.

1200022222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311086 (or 311082 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1200022222120 its reverse (212222200021), we get a palindrome (1412244422141).

The spelling of 1200022222120 in words is "one trillion, two hundred billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty".