21200022020189 has 2 divisors, whose sum is σ = 21200022020190. Its totient is φ = 21200022020188.

The previous prime is 21200022020131. The next prime is 21200022020209. The reversal of 21200022020189 is 98102022000212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12065827488100 + 9134194532089 = 3473590^2 + 3022283^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200022020189 - 2¹² = 21200022016093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200022020129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600011010094 + 10600011010095.

It is an arithmetic number, because the mean of its divisors is an integer number (10600011010095).

Almost surely, 2^{21200022020189} is an apocalyptic number.

It is an amenable number.

21200022020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200022020189 is an equidigital number, since it uses as much as digits as its factorization.

21200022020189 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 29.

The spelling of 21200022020189 in words is "twenty-one trillion, two hundred billion, twenty-two million, twenty thousand, one hundred eighty-nine".