1220001222212 has 24 divisors (see below), whose sum is σ = 2136364765080. Its totient is φ = 609611408640.

The previous prime is 1220001222197. The next prime is 1220001222337. The reversal of 1220001222212 is 2122221000221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 453648049156 + 766353173056 = 673534^2 + 875416^2 .

It is a super-3 number, since 3×1220001222212³ (a number of 37 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 57006698 + ... + 57028094.

It is an arithmetic number, because the mean of its divisors is an integer number (89015198545).

Almost surely, 2^{1220001222212} is an apocalyptic number.

It is an amenable number.

1220001222212 is a deficient number, since it is larger than the sum of its proper divisors (916363542868).

1220001222212 is a wasteful number, since it uses less digits than its factorization.

1220001222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29831 (or 29829 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220001222212 its reverse (2122221000221), we get a palindrome (3342222222433).

The spelling of 1220001222212 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty-two thousand, two hundred twelve".