21022031029 has 2 divisors, whose sum is σ = 21022031030. Its totient is φ = 21022031028.

The previous prime is 21022030979. The next prime is 21022031039. The reversal of 21022031029 is 92013022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20591676004 + 430355025 = 143498^2 + 20745^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022031029 - 2¹¹ = 21022028981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022031039) 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, 10511015514 + 10511015515.

It is an arithmetic number, because the mean of its divisors is an integer number (10511015515).

Almost surely, 2^21022031029 is an apocalyptic number.

It is an amenable number.

21022031029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022031029 is an equidigital number, since it uses as much as digits as its factorization.

21022031029 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 21022031029 in words is "twenty-one billion, twenty-two million, thirty-one thousand, twenty-nine".