1220021222212 has 24 divisors (see below), whose sum is σ = 2299301340056. Its totient is φ = 563079230208.

The previous prime is 1220021222177. The next prime is 1220021222213. The reversal of 1220021222212 is 2122221200221.

It can be written as a sum of positive squares in 4 ways, for example, as 49846813696 + 1170174408516 = 223264^2 + 1081746^2 .

It is a super-3 number, since 3×1220021222212³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220021222212.

It is not an unprimeable number, because it can be changed into a prime (1220021222213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6482998 + ... + 6668530.

Almost surely, 2^{1220021222212} is an apocalyptic number.

It is an amenable number.

1220021222212 is a deficient number, since it is larger than the sum of its proper divisors (1079280117844).

1220021222212 is a wasteful number, since it uses less digits than its factorization.

1220021222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312007 (or 312005 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1220021222212 its reverse (2122221200221), we get a palindrome (3342242422433).

The spelling of 1220021222212 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred twenty-two thousand, two hundred twelve".