10221539929 has 2 divisors, whose sum is σ = 10221539930. Its totient is φ = 10221539928.

The previous prime is 10221539927. The next prime is 10221540023. The reversal of 10221539929 is 92993512201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8091902025 + 2129637904 = 89955^2 + 46148^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221539929 - 2¹ = 10221539927 is a prime.

Together with 10221539927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10221539927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110769964 + 5110769965.

It is an arithmetic number, because the mean of its divisors is an integer number (5110769965).

Almost surely, 2^10221539929 is an apocalyptic number.

It is an amenable number.

10221539929 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221539929 is an equidigital number, since it uses as much as digits as its factorization.

10221539929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 10221539929 in words is "ten billion, two hundred twenty-one million, five hundred thirty-nine thousand, nine hundred twenty-nine".