1211122200212 has 12 divisors (see below), whose sum is σ = 2119500763380. Its totient is φ = 605550553536.

The previous prime is 1211122200187. The next prime is 1211122200269. The reversal of 1211122200212 is 2120022211121.

It can be written as a sum of positive squares in 2 ways, for example, as 424147402756 + 786974797456 = 651266^2 + 887116^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2375387 + ... + 2839842.

It is an arithmetic number, because the mean of its divisors is an integer number (176625063615).

Almost surely, 2^{1211122200212} is an apocalyptic number.

It is an amenable number.

1211122200212 is a deficient number, since it is larger than the sum of its proper divisors (908378563168).

1211122200212 is a wasteful number, since it uses less digits than its factorization.

1211122200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273290 (or 5273288 counting only the distinct ones).

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

Adding to 1211122200212 its reverse (2120022211121), we get a palindrome (3331144411333).

The spelling of 1211122200212 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred thousand, two hundred twelve".