100000020100121 has 2 divisors, whose sum is σ = 100000020100122. Its totient is φ = 100000020100120.

The previous prime is 100000020100111. The next prime is 100000020100147. The reversal of 100000020100121 is 121001020000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55586925680896 + 44413094419225 = 7455664^2 + 6664315^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000020100121 - 2¹⁰ = 100000020099097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100000020100099 and 100000020100108.

It is not a weakly prime, because it can be changed into another prime (100000020100111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000010050060 + 50000010050061.

It is an arithmetic number, because the mean of its divisors is an integer number (50000010050061).

Almost surely, 2^{100000020100121} is an apocalyptic number.

It is an amenable number.

100000020100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000020100121 is an equidigital number, since it uses as much as digits as its factorization.

100000020100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 100000020100121 its reverse (121001020000001), we get a palindrome (221001040100122).

The spelling of 100000020100121 in words is "one hundred trillion, twenty million, one hundred thousand, one hundred twenty-one".