1220212122 has 16 divisors (see below), whose sum is σ = 2506382112. Its totient is φ = 395744400.

The previous prime is 1220212121. The next prime is 1220212171. The reversal of 1220212122 is 2212120221.

It is not an unprimeable number, because it can be changed into a prime (1220212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2748004 + ... + 2748447.

It is an arithmetic number, because the mean of its divisors is an integer number (156648882).

Almost surely, 2^1220212122 is an apocalyptic number.

1220212122 is an abundant number, since it is smaller than the sum of its proper divisors (1286169990).

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

1220212122 is a wasteful number, since it uses less digits than its factorization.

1220212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5496493.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1220212122 is about 34931.5347787640. The cubic root of 1220212122 is about 1068.5916551566.

Adding to 1220212122 its reverse (2212120221), we get a palindrome (3432332343).

The spelling of 1220212122 in words is "one billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-two".