210122321009 has 2 divisors, whose sum is σ = 210122321010. Its totient is φ = 210122321008.

The previous prime is 210122320999. The next prime is 210122321021. The reversal of 210122321009 is 900123221012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210104890384 + 17430625 = 458372^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122321009 - 2³² = 205827353713 is a prime.

It is not a weakly prime, because it can be changed into another prime (210122321029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061160504 + 105061160505.

It is an arithmetic number, because the mean of its divisors is an integer number (105061160505).

Almost surely, 2^210122321009 is an apocalyptic number.

It is an amenable number.

210122321009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122321009 is an equidigital number, since it uses as much as digits as its factorization.

210122321009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 210122321009 in words is "two hundred ten billion, one hundred twenty-two million, three hundred twenty-one thousand, nine".