2201212201021 has 2 divisors, whose sum is σ = 2201212201022. Its totient is φ = 2201212201020.

The previous prime is 2201212200853. The next prime is 2201212201031. The reversal of 2201212201021 is 1201022121022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214428244121 + 986783956900 = 1102011^2 + 993370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201212201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201212200986 and 2201212201004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201212201031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100606100510 + 1100606100511.

It is an arithmetic number, because the mean of its divisors is an integer number (1100606100511).

Almost surely, 2^{2201212201021} is an apocalyptic number.

It is an amenable number.

2201212201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201212201021 is an equidigital number, since it uses as much as digits as its factorization.

2201212201021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201212201021 its reverse (1201022121022), we get a palindrome (3402234322043).

The spelling of 2201212201021 in words is "two trillion, two hundred one billion, two hundred twelve million, two hundred one thousand, twenty-one".