10021001221129 has 2 divisors, whose sum is σ = 10021001221130. Its totient is φ = 10021001221128.

The previous prime is 10021001221111. The next prime is 10021001221219. The reversal of 10021001221129 is 92112210012001.

Together with next prime (10021001221219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9986832438025 + 34168783104 = 3160195^2 + 184848^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021001221129 - 2⁵ = 10021001221097 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021001221109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010500610564 + 5010500610565.

It is an arithmetic number, because the mean of its divisors is an integer number (5010500610565).

Almost surely, 2^{10021001221129} is an apocalyptic number.

It is an amenable number.

10021001221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021001221129 is an equidigital number, since it uses as much as digits as its factorization.

10021001221129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 10021001221129 in words is "ten trillion, twenty-one billion, one million, two hundred twenty-one thousand, one hundred twenty-nine".