321203012111 has 2 divisors, whose sum is σ = 321203012112. Its totient is φ = 321203012110.

The previous prime is 321203012101. The next prime is 321203012149. The reversal of 321203012111 is 111210302123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321203012111 - 2¹⁴ = 321202995727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321203012111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321203012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160601506055 + 160601506056.

It is an arithmetic number, because the mean of its divisors is an integer number (160601506056).

Almost surely, 2^321203012111 is an apocalyptic number.

321203012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

321203012111 is an equidigital number, since it uses as much as digits as its factorization.

321203012111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321203012111 its reverse (111210302123), we get a palindrome (432413314234).

The spelling of 321203012111 in words is "three hundred twenty-one billion, two hundred three million, twelve thousand, one hundred eleven".