100001021129 has 2 divisors, whose sum is σ = 100001021130. Its totient is φ = 100001021128.

The previous prime is 100001021101. The next prime is 100001021143. The reversal of 100001021129 is 921120100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98518771129 + 1482250000 = 313877^2 + 38500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100001021129 is a prime.

It is not a weakly prime, because it can be changed into another prime (100001021189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000510564 + 50000510565.

It is an arithmetic number, because the mean of its divisors is an integer number (50000510565).

Almost surely, 2^100001021129 is an apocalyptic number.

It is an amenable number.

100001021129 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001021129 is an equidigital number, since it uses as much as digits as its factorization.

100001021129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 100001021129 in words is "one hundred billion, one million, twenty-one thousand, one hundred twenty-nine".