20211022129 has 2 divisors, whose sum is σ = 20211022130. Its totient is φ = 20211022128.

The previous prime is 20211022127. The next prime is 20211022157. The reversal of 20211022129 is 92122011202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19858446400 + 352575729 = 140920^2 + 18777^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211022129 - 2¹ = 20211022127 is a prime.

Together with 20211022127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20211022127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105511064 + 10105511065.

It is an arithmetic number, because the mean of its divisors is an integer number (10105511065).

Almost surely, 2^20211022129 is an apocalyptic number.

It is an amenable number.

20211022129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211022129 is an equidigital number, since it uses as much as digits as its factorization.

20211022129 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 22.

The spelling of 20211022129 in words is "twenty billion, two hundred eleven million, twenty-two thousand, one hundred twenty-nine".