1211101101212 has 48 divisors (see below), whose sum is σ = 2170439476800. Its totient is φ = 591149145600.

The previous prime is 1211101101181. The next prime is 1211101101241. The reversal of 1211101101212 is 2121011011121.

It is a congruent number.

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, 140348114 + ... + 140356742.

It is an arithmetic number, because the mean of its divisors is an integer number (45217489100).

Almost surely, 2^{1211101101212} is an apocalyptic number.

It is an amenable number.

1211101101212 is a deficient number, since it is larger than the sum of its proper divisors (959338375588).

1211101101212 is a wasteful number, since it uses less digits than its factorization.

1211101101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566 (or 13564 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211101101212 its reverse (2121011011121), we get a palindrome (3332112112333).

Subtracting 1211101101212 from its reverse (2121011011121), we obtain a palindrome (909909909909).

The spelling of 1211101101212 in words is "one trillion, two hundred eleven billion, one hundred one million, one hundred one thousand, two hundred twelve".