2011201000021 has 2 divisors, whose sum is σ = 2011201000022. Its totient is φ = 2011201000020.

The previous prime is 2011200999979. The next prime is 2011201000031. The reversal of 2011201000021 is 1200001021102.

It is an a-pointer prime, because the next prime (2011201000031) can be obtained adding 2011201000021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1425385271025 + 585815728996 = 1193895^2 + 765386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011201000021 - 2¹³ = 2011200991829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011200999971 and 2011201000007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011201000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005600500010 + 1005600500011.

It is an arithmetic number, because the mean of its divisors is an integer number (1005600500011).

Almost surely, 2^{2011201000021} is an apocalyptic number.

It is an amenable number.

2011201000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011201000021 is an equidigital number, since it uses as much as digits as its factorization.

2011201000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2011201000021 its reverse (1200001021102), we get a palindrome (3211202021123).

The spelling of 2011201000021 in words is "two trillion, eleven billion, two hundred one million, twenty-one", and thus it is an aban number.