221323216139 has 2 divisors, whose sum is σ = 221323216140. Its totient is φ = 221323216138.

The previous prime is 221323216133. The next prime is 221323216171. The reversal of 221323216139 is 931612323122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221323216139 is a prime.

It is a super-2 number, since 2×221323216139² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221323216099 and 221323216108.

It is not a weakly prime, because it can be changed into another prime (221323216133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661608069 + 110661608070.

It is an arithmetic number, because the mean of its divisors is an integer number (110661608070).

Almost surely, 2^221323216139 is an apocalyptic number.

221323216139 is a deficient number, since it is larger than the sum of its proper divisors (1).

221323216139 is an equidigital number, since it uses as much as digits as its factorization.

221323216139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The spelling of 221323216139 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred sixteen thousand, one hundred thirty-nine".