1211201100212 has 6 divisors (see below), whose sum is σ = 2119601925378. Its totient is φ = 605600550104.

The previous prime is 1211201100211. The next prime is 1211201100229. The reversal of 1211201100212 is 2120011021121.

It can be written as a sum of positive squares in only one way, i.e., 913179004816 + 298022095396 = 955604^2 + 545914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201100211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151400137523 + ... + 151400137530.

It is an arithmetic number, because the mean of its divisors is an integer number (353266987563).

Almost surely, 2^{1211201100212} is an apocalyptic number.

It is an amenable number.

1211201100212 is a deficient number, since it is larger than the sum of its proper divisors (908400825166).

1211201100212 is a wasteful number, since it uses less digits than its factorization.

1211201100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302800275057 (or 302800275055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211201100212 its reverse (2120011021121), we get a palindrome (3331212121333).

The spelling of 1211201100212 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred thousand, two hundred twelve".