1211011120011 has 64 divisors (see below), whose sum is σ = 2119327211520. Its totient is φ = 595911893760.

The previous prime is 1211011119931. The next prime is 1211011120019. The reversal of 1211011120011 is 1100211101121.

It is not a de Polignac number, because 1211011120011 - 2⁹ = 1211011119499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211011120019) 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, 55496775 + ... + 55518591.

It is an arithmetic number, because the mean of its divisors is an integer number (33114487680).

Almost surely, 2^{1211011120011} is an apocalyptic number.

1211011120011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211011120011 is a deficient number, since it is larger than the sum of its proper divisors (908316091509).

1211011120011 is a wasteful number, since it uses less digits than its factorization.

1211011120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34504.

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

Adding to 1211011120011 its reverse (1100211101121), we get a palindrome (2311222221132).

It can be divided in two parts, 12110 and 11120011, that added together give a triangular number (11132121 = T₄₇₁₈).

The spelling of 1211011120011 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twenty thousand, eleven".