35313643722221 has 6 divisors (see below), whose sum is σ = 36489540288366. Its totient is φ = 34174493923800.

The previous prime is 35313643722179. The next prime is 35313643722307. The reversal of 35313643722221 is 12222734631353.

It can be written as a sum of positive squares in only one way, i.e., 25509317955625 + 9804325766596 = 5050675^2 + 3131186^2 .

It is not a de Polignac number, because 35313643722221 - 2¹⁰ = 35313643721197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35313643722121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18373382870 + ... + 18373384791.

It is an arithmetic number, because the mean of its divisors is an integer number (6081590048061).

Almost surely, 2^{35313643722221} is an apocalyptic number.

35313643722221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

35313643722221 is a deficient number, since it is larger than the sum of its proper divisors (1175896566145).

35313643722221 is an equidigital number, since it uses as much as digits as its factorization.

35313643722221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36746767723 (or 36746767692 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 44.

The spelling of 35313643722221 in words is "thirty-five trillion, three hundred thirteen billion, six hundred forty-three million, seven hundred twenty-two thousand, two hundred twenty-one".