2011120201721 has 2 divisors, whose sum is σ = 2011120201722. Its totient is φ = 2011120201720.

The previous prime is 2011120201691. The next prime is 2011120201757. The reversal of 2011120201721 is 1271020211102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155238032400 + 855882169321 = 1074820^2 + 925139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011120201721 - 2³⁴ = 1993940332537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011120201693 and 2011120201702.

It is not a weakly prime, because it can be changed into another prime (2011125201721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005560100860 + 1005560100861.

It is an arithmetic number, because the mean of its divisors is an integer number (1005560100861).

Almost surely, 2^{2011120201721} is an apocalyptic number.

It is an amenable number.

2011120201721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011120201721 is an equidigital number, since it uses as much as digits as its factorization.

2011120201721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 2011120201721 its reverse (1271020211102), we get a palindrome (3282140412823).

The spelling of 2011120201721 in words is "two trillion, eleven billion, one hundred twenty million, two hundred one thousand, seven hundred twenty-one".