34220621521 has 2 divisors, whose sum is σ = 34220621522. Its totient is φ = 34220621520.

The previous prime is 34220621509. The next prime is 34220621569. The reversal of 34220621521 is 12512602243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33749731521 + 470890000 = 183711^2 + 21700^2 .

It is a cyclic number.

It is not a de Polignac number, because 34220621521 - 2⁹ = 34220621009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34220621521.

It is not a weakly prime, because it can be changed into another prime (34220621581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17110310760 + 17110310761.

It is an arithmetic number, because the mean of its divisors is an integer number (17110310761).

Almost surely, 2^34220621521 is an apocalyptic number.

It is an amenable number.

34220621521 is a deficient number, since it is larger than the sum of its proper divisors (1).

34220621521 is an equidigital number, since it uses as much as digits as its factorization.

34220621521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 34220621521 in words is "thirty-four billion, two hundred twenty million, six hundred twenty-one thousand, five hundred twenty-one".