1211011022011 has 16 divisors (see below), whose sum is σ = 1435307682240. Its totient is φ = 999716659200.

The previous prime is 1211011021949. The next prime is 1211011022017. The reversal of 1211011022011 is 1102201101121.

It is a happy number.

It is not a de Polignac number, because 1211011022011 - 2²¹ = 1211008924859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211011021982 and 1211011022000.

It is not an unprimeable number, because it can be changed into a prime (1211011022017) 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, 7356966 + ... + 7519771.

It is an arithmetic number, because the mean of its divisors is an integer number (89706730140).

Almost surely, 2^{1211011022011} is an apocalyptic number.

1211011022011 is a deficient number, since it is larger than the sum of its proper divisors (224296660229).

1211011022011 is a wasteful number, since it uses less digits than its factorization.

1211011022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14877174.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211011022011 its reverse (1102201101121), we get a palindrome (2313212123132).

The spelling of 1211011022011 in words is "one trillion, two hundred eleven billion, eleven million, twenty-two thousand, eleven".