1211201211 has 16 divisors (see below), whose sum is σ = 1822498560. Its totient is φ = 708748320.

The previous prime is 1211201207. The next prime is 1211201237. The reversal of 1211201211 is 1121021121.

1211201211 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211201211 - 2² = 1211201207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211201291) 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, 631855 + ... + 633768.

It is an arithmetic number, because the mean of its divisors is an integer number (113906160).

Almost surely, 2^1211201211 is an apocalyptic number.

1211201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211201211 is a deficient number, since it is larger than the sum of its proper divisors (611297349).

1211201211 is a wasteful number, since it uses less digits than its factorization.

1211201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265666.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1211201211 is about 34802.3161729216. The cubic root of 1211201211 is about 1065.9547408410.

Adding to 1211201211 its reverse (1121021121), we get a palindrome (2332222332).

The spelling of 1211201211 in words is "one billion, two hundred eleven million, two hundred one thousand, two hundred eleven".