21022110020129 has 2 divisors, whose sum is σ = 21022110020130. Its totient is φ = 21022110020128.

The previous prime is 21022110020101. The next prime is 21022110020137. The reversal of 21022110020129 is 92102001122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16451322576529 + 4570787443600 = 4056023^2 + 2137940^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022110020129 - 2⁴⁰ = 19922598392353 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022110020159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511055010064 + 10511055010065.

It is an arithmetic number, because the mean of its divisors is an integer number (10511055010065).

Almost surely, 2^{21022110020129} is an apocalyptic number.

It is an amenable number.

21022110020129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022110020129 is an equidigital number, since it uses as much as digits as its factorization.

21022110020129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21022110020129 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, twenty thousand, one hundred twenty-nine".