1212220202122 has 16 divisors (see below), whose sum is σ = 1840874995080. Its totient is φ = 598630735872.

The previous prime is 1212220202041. The next prime is 1212220202147. The reversal of 1212220202122 is 2212020222121.

It can be written as a sum of positive squares in 4 ways, for example, as 429170422321 + 783049779801 = 655111^2 + 884901^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212220202122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8814583 + ... + 8951050.

Almost surely, 2^{1212220202122} is an apocalyptic number.

1212220202122 is a deficient number, since it is larger than the sum of its proper divisors (628654792958).

1212220202122 is a wasteful number, since it uses less digits than its factorization.

1212220202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17766057.

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

Adding to 1212220202122 its reverse (2212020222121), we get a palindrome (3424240424243).

The spelling of 1212220202122 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred two thousand, one hundred twenty-two".