21120221202211 has 2 divisors, whose sum is σ = 21120221202212. Its totient is φ = 21120221202210.

The previous prime is 21120221202193. The next prime is 21120221202233. The reversal of 21120221202211 is 11220212202112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120221202211 - 2¹¹ = 21120221200163 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120221272211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560110601105 + 10560110601106.

It is an arithmetic number, because the mean of its divisors is an integer number (10560110601106).

Almost surely, 2^{21120221202211} is an apocalyptic number.

21120221202211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120221202211 is an equidigital number, since it uses as much as digits as its factorization.

21120221202211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21120221202211 its reverse (11220212202112), we get a palindrome (32340433404323).

Subtracting from 21120221202211 its reverse (11220212202112), we obtain a palindrome (9900009000099).

The spelling of 21120221202211 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, two hundred two thousand, two hundred eleven".