1211311200011 has 16 divisors (see below), whose sum is σ = 1327482984960. Its totient is φ = 1096150228320.

The previous prime is 1211311199977. The next prime is 1211311200041. The reversal of 1211311200011 is 1100021131121.

It is a cyclic number.

It is not a de Polignac number, because 1211311200011 - 2²² = 1211307005707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211311200041) 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, 12402776 + ... + 12500058.

It is an arithmetic number, because the mean of its divisors is an integer number (82967686560).

Almost surely, 2^{1211311200011} is an apocalyptic number.

1211311200011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211311200011 is a deficient number, since it is larger than the sum of its proper divisors (116171784949).

1211311200011 is a wasteful number, since it uses less digits than its factorization.

1211311200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102466.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1211311200011 its reverse (1100021131121), we get a palindrome (2311332331132).

The spelling of 1211311200011 in words is "one trillion, two hundred eleven billion, three hundred eleven million, two hundred thousand, eleven".