1211201101211 has 16 divisors (see below), whose sum is σ = 1255645426560. Its totient is φ = 1167809011200.

The previous prime is 1211201101207. The next prime is 1211201101213. The reversal of 1211201101211 is 1121011021121.

It is a cyclic number.

It is not a de Polignac number, because 1211201101211 - 2² = 1211201101207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211201101213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457250 + ... + 1622183.

It is an arithmetic number, because the mean of its divisors is an integer number (78477839160).

Almost surely, 2^{1211201101211} is an apocalyptic number.

1211201101211 is a deficient number, since it is larger than the sum of its proper divisors (44444325349).

1211201101211 is a wasteful number, since it uses less digits than its factorization.

1211201101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079686.

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

Adding to 1211201101211 its reverse (1121011021121), we get a palindrome (2332212122332).

The spelling of 1211201101211 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred one thousand, two hundred eleven".