21022003129 has 2 divisors, whose sum is σ = 21022003130. Its totient is φ = 21022003128.

The previous prime is 21022003117. The next prime is 21022003141. The reversal of 21022003129 is 92130022012.

It is a balanced prime because it is at equal distance from previous prime (21022003117) and next prime (21022003141).

It can be written as a sum of positive squares in only one way, i.e., 19745870400 + 1276132729 = 140520^2 + 35723^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022003129 - 2⁷ = 21022003001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022003109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511001564 + 10511001565.

It is an arithmetic number, because the mean of its divisors is an integer number (10511001565).

Almost surely, 2^21022003129 is an apocalyptic number.

It is an amenable number.

21022003129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022003129 is an equidigital number, since it uses as much as digits as its factorization.

21022003129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 21022003129 in words is "twenty-one billion, twenty-two million, three thousand, one hundred twenty-nine".