1211100222212 has 48 divisors (see below), whose sum is σ = 2197585978560. Its totient is φ = 583316399232.

The previous prime is 1211100222181. The next prime is 1211100222247. The reversal of 1211100222212 is 2122220011121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161111078 + ... + 161118594.

It is an arithmetic number, because the mean of its divisors is an integer number (45783041220).

Almost surely, 2^{1211100222212} is an apocalyptic number.

It is an amenable number.

1211100222212 is a deficient number, since it is larger than the sum of its proper divisors (986485756348).

1211100222212 is a wasteful number, since it uses less digits than its factorization.

1211100222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580 (or 10578 counting only the distinct ones).

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

Adding to 1211100222212 its reverse (2122220011121), we get a palindrome (3333320233333).

The spelling of 1211100222212 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred twenty-two thousand, two hundred twelve".