221131112111999 has 2 divisors, whose sum is σ = 221131112112000. Its totient is φ = 221131112111998.

The previous prime is 221131112111993. The next prime is 221131112112049. The reversal of 221131112111999 is 999111211131122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221131112111999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221131112111993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565556055999 + 110565556056000.

It is an arithmetic number, because the mean of its divisors is an integer number (110565556056000).

Almost surely, 2^{221131112111999} is an apocalyptic number.

221131112111999 is a deficient number, since it is larger than the sum of its proper divisors (1).

221131112111999 is an equidigital number, since it uses as much as digits as its factorization.

221131112111999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 44.

The spelling of 221131112111999 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, nine hundred ninety-nine".