34722180821 has 2 divisors, whose sum is σ = 34722180822. Its totient is φ = 34722180820.

The previous prime is 34722180761. The next prime is 34722180833. The reversal of 34722180821 is 12808122743.

34722180821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34408395025 + 313785796 = 185495^2 + 17714^2 .

It is a cyclic number.

It is not a de Polignac number, because 34722180821 - 2¹⁸ = 34721918677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34722180121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17361090410 + 17361090411.

It is an arithmetic number, because the mean of its divisors is an integer number (17361090411).

Almost surely, 2^34722180821 is an apocalyptic number.

It is an amenable number.

34722180821 is a deficient number, since it is larger than the sum of its proper divisors (1).

34722180821 is an equidigital number, since it uses as much as digits as its factorization.

34722180821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 34722180821 in words is "thirty-four billion, seven hundred twenty-two million, one hundred eighty thousand, eight hundred twenty-one".