2211112000021 has 2 divisors, whose sum is σ = 2211112000022. Its totient is φ = 2211112000020.

The previous prime is 2211112000007. The next prime is 2211112000033. The reversal of 2211112000021 is 1200002111122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2152529122500 + 58582877521 = 1467150^2 + 242039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211112000021 - 2⁵ = 2211111999989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211111999965 and 2211112000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211112000001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105556000010 + 1105556000011.

It is an arithmetic number, because the mean of its divisors is an integer number (1105556000011).

Almost surely, 2^{2211112000021} is an apocalyptic number.

It is an amenable number.

2211112000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211112000021 is an equidigital number, since it uses as much as digits as its factorization.

2211112000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2211112000021 its reverse (1200002111122), we get a palindrome (3411114111143).

The spelling of 2211112000021 in words is "two trillion, two hundred eleven billion, one hundred twelve million, twenty-one", and thus it is an aban number.