221050655429 has 2 divisors, whose sum is σ = 221050655430. Its totient is φ = 221050655428.

The previous prime is 221050655411. The next prime is 221050655503. The reversal of 221050655429 is 924556050122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175915652929 + 45135002500 = 419423^2 + 212450^2 .

It is a cyclic number.

It is not a de Polignac number, because 221050655429 - 2²⁴ = 221033878213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221050655129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110525327714 + 110525327715.

It is an arithmetic number, because the mean of its divisors is an integer number (110525327715).

Almost surely, 2^221050655429 is an apocalyptic number.

It is an amenable number.

221050655429 is a deficient number, since it is larger than the sum of its proper divisors (1).

221050655429 is an equidigital number, since it uses as much as digits as its factorization.

221050655429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 221050655429 in words is "two hundred twenty-one billion, fifty million, six hundred fifty-five thousand, four hundred twenty-nine".