221267281488139 has 2 divisors, whose sum is σ = 221267281488140. Its totient is φ = 221267281488138.

The previous prime is 221267281488137. The next prime is 221267281488241. The reversal of 221267281488139 is 931884182762122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221267281488139 - 2¹ = 221267281488137 is a prime.

Together with 221267281488137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221267281488133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110633640744069 + 110633640744070.

It is an arithmetic number, because the mean of its divisors is an integer number (110633640744070).

Almost surely, 2^{221267281488139} is an apocalyptic number.

221267281488139 is a deficient number, since it is larger than the sum of its proper divisors (1).

221267281488139 is an equidigital number, since it uses as much as digits as its factorization.

221267281488139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 64.

The spelling of 221267281488139 in words is "two hundred twenty-one trillion, two hundred sixty-seven billion, two hundred eighty-one million, four hundred eighty-eight thousand, one hundred thirty-nine".