1211011020011 has 32 divisors (see below), whose sum is σ = 1352675503872. Its totient is φ = 1077025864320.

The previous prime is 1211011019951. The next prime is 1211011020059. The reversal of 1211011020011 is 1100201101121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211011020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211011019974 and 1211011020001.

It is not an unprimeable number, because it can be changed into a prime (1211011020091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30277256 + ... + 30317226.

It is an arithmetic number, because the mean of its divisors is an integer number (42271109496).

Almost surely, 2^{1211011020011} is an apocalyptic number.

1211011020011 is a deficient number, since it is larger than the sum of its proper divisors (141664483861).

1211011020011 is a wasteful number, since it uses less digits than its factorization.

1211011020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40763.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211011020011 its reverse (1100201101121), we get a palindrome (2311212121132).

The spelling of 1211011020011 in words is "one trillion, two hundred eleven billion, eleven million, twenty thousand, eleven".