1000021222201 has 2 divisors, whose sum is σ = 1000021222202. Its totient is φ = 1000021222200.

The previous prime is 1000021222183. The next prime is 1000021222231. The reversal of 1000021222201 is 1022221200001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781988258601 + 218032963600 = 884301^2 + 466940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000021222201 - 2¹¹ = 1000021220153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000021222231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010611100 + 500010611101.

It is an arithmetic number, because the mean of its divisors is an integer number (500010611101).

Almost surely, 2^{1000021222201} is an apocalyptic number.

It is an amenable number.

1000021222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000021222201 is an equidigital number, since it uses as much as digits as its factorization.

1000021222201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1000021222201 its reverse (1022221200001), we get a palindrome (2022242422202).

The spelling of 1000021222201 in words is "one trillion, twenty-one million, two hundred twenty-two thousand, two hundred one".