2011011206501 has 32 divisors (see below), whose sum is σ = 2446022344320. Its totient is φ = 1629499852800.

The previous prime is 2011011206459. The next prime is 2011011206537. The reversal of 2011011206501 is 1056021101102.

It is a cyclic number.

It is not a de Polignac number, because 2011011206501 - 2¹⁰ = 2011011205477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011011206101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9836561 + ... + 10038921.

It is an arithmetic number, because the mean of its divisors is an integer number (76438198260).

Almost surely, 2^{2011011206501} is an apocalyptic number.

It is an amenable number.

2011011206501 is a deficient number, since it is larger than the sum of its proper divisors (435011137819).

2011011206501 is a wasteful number, since it uses less digits than its factorization.

2011011206501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205205.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 2011011206501 its reverse (1056021101102), we get a palindrome (3067032307603).

The spelling of 2011011206501 in words is "two trillion, eleven billion, eleven million, two hundred six thousand, five hundred one".