21210150289 has 2 divisors, whose sum is σ = 21210150290. Its totient is φ = 21210150288.

The previous prime is 21210150209. The next prime is 21210150293. The reversal of 21210150289 is 98205101212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16943447889 + 4266702400 = 130167^2 + 65320^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210150289 - 2⁹ = 21210149777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210150289.

It is not a weakly prime, because it can be changed into another prime (21210150209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605075144 + 10605075145.

It is an arithmetic number, because the mean of its divisors is an integer number (10605075145).

Almost surely, 2^21210150289 is an apocalyptic number.

It is an amenable number.

21210150289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210150289 is an equidigital number, since it uses as much as digits as its factorization.

21210150289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 21210150289 in words is "twenty-one billion, two hundred ten million, one hundred fifty thousand, two hundred eighty-nine".