35673680221 has 2 divisors, whose sum is σ = 35673680222. Its totient is φ = 35673680220.

The previous prime is 35673680219. The next prime is 35673680233. The reversal of 35673680221 is 12208637653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35552988025 + 120692196 = 188555^2 + 10986^2 .

It is a cyclic number.

It is not a de Polignac number, because 35673680221 - 2¹ = 35673680219 is a prime.

It is a super-2 number, since 2×35673680221² (a number of 22 digits) contains 22 as substring.

Together with 35673680219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35673680321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17836840110 + 17836840111.

It is an arithmetic number, because the mean of its divisors is an integer number (17836840111).

Almost surely, 2^35673680221 is an apocalyptic number.

It is an amenable number.

35673680221 is a deficient number, since it is larger than the sum of its proper divisors (1).

35673680221 is an equidigital number, since it uses as much as digits as its factorization.

35673680221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 35673680221 in words is "thirty-five billion, six hundred seventy-three million, six hundred eighty thousand, two hundred twenty-one".