100001222101021 has 2 divisors, whose sum is σ = 100001222101022. Its totient is φ = 100001222101020.

The previous prime is 100001222100953. The next prime is 100001222101031. The reversal of 100001222101021 is 120101222100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93284111056900 + 6717111044121 = 9658370^2 + 2591739^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001222101021 - 2⁹ = 100001222100509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100001222100992 and 100001222101010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100001222101031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000611050510 + 50000611050511.

It is an arithmetic number, because the mean of its divisors is an integer number (50000611050511).

Almost surely, 2^{100001222101021} is an apocalyptic number.

It is an amenable number.

100001222101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001222101021 is an equidigital number, since it uses as much as digits as its factorization.

100001222101021 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 100001222101021 its reverse (120101222100001), we get a palindrome (220102444201022).

The spelling of 100001222101021 in words is "one hundred trillion, one billion, two hundred twenty-two million, one hundred one thousand, twenty-one".