1212210221122 has 4 divisors (see below), whose sum is σ = 1818315331686. Its totient is φ = 606105110560.

The previous prime is 1212210221111. The next prime is 1212210221147. The reversal of 1212210221122 is 2211220122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1137078862921 + 75131358201 = 1066339^2 + 274101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212210221122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303052555279 + ... + 303052555282.

Almost surely, 2^{1212210221122} is an apocalyptic number.

1212210221122 is a deficient number, since it is larger than the sum of its proper divisors (606105110564).

1212210221122 is an equidigital number, since it uses as much as digits as its factorization.

1212210221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606105110563.

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

Adding to 1212210221122 its reverse (2211220122121), we get a palindrome (3423430343243).

Subtracting 1212210221122 from its reverse (2211220122121), we obtain a palindrome (999009900999).

The spelling of 1212210221122 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-two".