1211010011211 has 64 divisors (see below), whose sum is σ = 2226555749376. Its totient is φ = 565009344000.

The previous prime is 1211010011191. The next prime is 1211010011213. The reversal of 1211010011211 is 1121100101121.

It is not a de Polignac number, because 1211010011211 - 2⁹ = 1211010010699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211010011213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5338440 + ... + 5560661.

It is an arithmetic number, because the mean of its divisors is an integer number (34789933584).

Almost surely, 2^{1211010011211} is an apocalyptic number.

1211010011211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211010011211 is a deficient number, since it is larger than the sum of its proper divisors (1015545738165).

1211010011211 is a wasteful number, since it uses less digits than its factorization.

1211010011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899172.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211010011211 its reverse (1121100101121), we get a palindrome (2332110112332).

The spelling of 1211010011211 in words is "one trillion, two hundred eleven billion, ten million, eleven thousand, two hundred eleven".