221210224129 has 2 divisors, whose sum is σ = 221210224130. Its totient is φ = 221210224128.

The previous prime is 221210224117. The next prime is 221210224177. The reversal of 221210224129 is 921422012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210295616400 + 10914607729 = 458580^2 + 104473^2 .

It is a cyclic number.

It is not a de Polignac number, because 221210224129 - 2⁵ = 221210224097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221210224097 and 221210224106.

It is not a weakly prime, because it can be changed into another prime (221210224199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605112064 + 110605112065.

It is an arithmetic number, because the mean of its divisors is an integer number (110605112065).

Almost surely, 2^221210224129 is an apocalyptic number.

It is an amenable number.

221210224129 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210224129 is an equidigital number, since it uses as much as digits as its factorization.

221210224129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 221210224129 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-four thousand, one hundred twenty-nine".