2201211001021 has 2 divisors, whose sum is σ = 2201211001022. Its totient is φ = 2201211001020.

The previous prime is 2201211001019. The next prime is 2201211001043. The reversal of 2201211001021 is 1201001121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111830929796 + 89380071225 = 1453214^2 + 298965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201211001021 - 2¹ = 2201211001019 is a prime.

Together with 2201211001019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2201211000992 and 2201211001010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201211001051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100605500510 + 1100605500511.

It is an arithmetic number, because the mean of its divisors is an integer number (1100605500511).

Almost surely, 2^{2201211001021} is an apocalyptic number.

It is an amenable number.

2201211001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201211001021 is an equidigital number, since it uses as much as digits as its factorization.

2201211001021 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 2201211001021 its reverse (1201001121022), we get a palindrome (3402212122043).

The spelling of 2201211001021 in words is "two trillion, two hundred one billion, two hundred eleven million, one thousand, twenty-one".