1211200122212 has 6 divisors (see below), whose sum is σ = 2119600213878. Its totient is φ = 605600061104.

The previous prime is 1211200122203. The next prime is 1211200122239. The reversal of 1211200122212 is 2122210021121.

It can be written as a sum of positive squares in only one way, i.e., 1184453482276 + 26746639936 = 1088326^2 + 163544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151400015273 + ... + 151400015280.

It is an arithmetic number, because the mean of its divisors is an integer number (353266702313).

Almost surely, 2^{1211200122212} is an apocalyptic number.

It is an amenable number.

1211200122212 is a deficient number, since it is larger than the sum of its proper divisors (908400091666).

1211200122212 is a wasteful number, since it uses less digits than its factorization.

1211200122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302800030557 (or 302800030555 counting only the distinct ones).

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

Adding to 1211200122212 its reverse (2122210021121), we get a palindrome (3333410143333).

The spelling of 1211200122212 in words is "one trillion, two hundred eleven billion, two hundred million, one hundred twenty-two thousand, two hundred twelve".