2221202120 has 16 divisors (see below), whose sum is σ = 4997704860. Its totient is φ = 888480832.

The previous prime is 2221202117. The next prime is 2221202131. The reversal of 2221202120 is 212021222.

It can be written as a sum of positive squares in 2 ways, for example, as 2062794724 + 158407396 = 45418^2 + 12586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221202095 and 2221202104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27764987 + ... + 27765066.

Almost surely, 2^2221202120 is an apocalyptic number.

2221202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221202120 is an abundant number, since it is smaller than the sum of its proper divisors (2776502740).

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

2221202120 is a wasteful number, since it uses less digits than its factorization.

2221202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530064 (or 55530060 counting only the distinct ones).

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

The square root of 2221202120 is about 47129.6310191370. The cubic root of 2221202120 is about 1304.7561715690.

Adding to 2221202120 its reverse (212021222), we get a palindrome (2433223342).

It can be divided in two parts, 2 and 221202120, that added together give a palindrome (221202122).

The spelling of 2221202120 in words is "two billion, two hundred twenty-one million, two hundred two thousand, one hundred twenty".