221020100102189 has 2 divisors, whose sum is σ = 221020100102190. Its totient is φ = 221020100102188.

The previous prime is 221020100102173. The next prime is 221020100102233. The reversal of 221020100102189 is 981201001020122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122531505666025 + 98488594436164 = 11069395^2 + 9924142^2 .

It is a cyclic number.

It is not a de Polignac number, because 221020100102189 - 2⁴ = 221020100102173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020100102119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510050051094 + 110510050051095.

It is an arithmetic number, because the mean of its divisors is an integer number (110510050051095).

Almost surely, 2^{221020100102189} is an apocalyptic number.

It is an amenable number.

221020100102189 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020100102189 is an equidigital number, since it uses as much as digits as its factorization.

221020100102189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 221020100102189 in words is "two hundred twenty-one trillion, twenty billion, one hundred million, one hundred two thousand, one hundred eighty-nine".