21022131220229 has 2 divisors, whose sum is σ = 21022131220230. Its totient is φ = 21022131220228.

The previous prime is 21022131220127. The next prime is 21022131220291. The reversal of 21022131220229 is 92202213122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19003452897025 + 2018678323204 = 4359295^2 + 1420802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022131220229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022131250229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511065610114 + 10511065610115.

It is an arithmetic number, because the mean of its divisors is an integer number (10511065610115).

Almost surely, 2^{21022131220229} is an apocalyptic number.

It is an amenable number.

21022131220229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022131220229 is an equidigital number, since it uses as much as digits as its factorization.

21022131220229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 21022131220229 in words is "twenty-one trillion, twenty-two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred twenty-nine".