1212220112122 has 16 divisors (see below), whose sum is σ = 1839615471720. Its totient is φ = 599021285632.

The previous prime is 1212220112101. The next prime is 1212220112149. The reversal of 1212220112122 is 2212110222121.

It can be written as a sum of positive squares in 4 ways, for example, as 987421803481 + 224798308641 = 993691^2 + 474129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212220112122.

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, 1198333 + ... + 1964800.

Almost surely, 2^{1212220112122} is an apocalyptic number.

1212220112122 is a deficient number, since it is larger than the sum of its proper divisors (627395359598).

1212220112122 is a wasteful number, since it uses less digits than its factorization.

1212220112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165377.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212220112122 its reverse (2212110222121), we get a palindrome (3424330334243).

The spelling of 1212220112122 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-two".