221108933429 has 2 divisors, whose sum is σ = 221108933430. Its totient is φ = 221108933428.

The previous prime is 221108933413. The next prime is 221108933483. The reversal of 221108933429 is 924339801122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163159444900 + 57949488529 = 403930^2 + 240727^2 .

It is a cyclic number.

It is not a de Polignac number, because 221108933429 - 2⁴ = 221108933413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221108933429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221108930429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110554466714 + 110554466715.

It is an arithmetic number, because the mean of its divisors is an integer number (110554466715).

Almost surely, 2^221108933429 is an apocalyptic number.

It is an amenable number.

221108933429 is a deficient number, since it is larger than the sum of its proper divisors (1).

221108933429 is an equidigital number, since it uses as much as digits as its factorization.

221108933429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 221108933429 in words is "two hundred twenty-one billion, one hundred eight million, nine hundred thirty-three thousand, four hundred twenty-nine".