321605136211 has 2 divisors, whose sum is σ = 321605136212. Its totient is φ = 321605136210.

The previous prime is 321605136157. The next prime is 321605136239. The reversal of 321605136211 is 112631506123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321605136211 - 2⁹ = 321605135699 is a prime.

It is not a weakly prime, because it can be changed into another prime (321605136241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160802568105 + 160802568106.

It is an arithmetic number, because the mean of its divisors is an integer number (160802568106).

Almost surely, 2^321605136211 is an apocalyptic number.

321605136211 is a deficient number, since it is larger than the sum of its proper divisors (1).

321605136211 is an equidigital number, since it uses as much as digits as its factorization.

321605136211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 321605136211 in words is "three hundred twenty-one billion, six hundred five million, one hundred thirty-six thousand, two hundred eleven".