1211001222212 has 12 divisors (see below), whose sum is σ = 2120575855356. Its totient is φ = 605122406400.

The previous prime is 1211001222199. The next prime is 1211001222229. The reversal of 1211001222212 is 2122221001121.

It can be written as a sum of positive squares in 2 ways, for example, as 1177342182916 + 33659039296 = 1085054^2 + 183464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94543973 + ... + 94556780.

It is an arithmetic number, because the mean of its divisors is an integer number (176714654613).

Almost surely, 2^{1211001222212} is an apocalyptic number.

It is an amenable number.

1211001222212 is a deficient number, since it is larger than the sum of its proper divisors (909574633144).

1211001222212 is a wasteful number, since it uses less digits than its factorization.

1211001222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189102358 (or 189102356 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211001222212 its reverse (2122221001121), we get a palindrome (3333222223333).

The spelling of 1211001222212 in words is "one trillion, two hundred eleven billion, one million, two hundred twenty-two thousand, two hundred twelve".