1211102202211 has 16 divisors (see below), whose sum is σ = 1392806010240. Its totient is φ = 1041504549120.

The previous prime is 1211102202197. The next prime is 1211102202229. The reversal of 1211102202211 is 1122022011121.

It is a cyclic number.

It is not a de Polignac number, because 1211102202211 - 2¹⁵ = 1211102169443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211102206211) 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, 4164505 + ... + 4445818.

It is an arithmetic number, because the mean of its divisors is an integer number (87050375640).

Almost surely, 2^{1211102202211} is an apocalyptic number.

1211102202211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211102202211 is a deficient number, since it is larger than the sum of its proper divisors (181703808029).

1211102202211 is a wasteful number, since it uses less digits than its factorization.

1211102202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611026.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211102202211 its reverse (1122022011121), we get a palindrome (2333124213332).

The spelling of 1211102202211 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred two thousand, two hundred eleven".