210101221249 has 2 divisors, whose sum is σ = 210101221250. Its totient is φ = 210101221248.

The previous prime is 210101221243. The next prime is 210101221279. The reversal of 210101221249 is 942122101012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145575060849 + 64526160400 = 381543^2 + 254020^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101221249 - 2¹⁵ = 210101188481 is a prime.

It is not a weakly prime, because it can be changed into another prime (210101221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050610624 + 105050610625.

It is an arithmetic number, because the mean of its divisors is an integer number (105050610625).

Almost surely, 2^210101221249 is an apocalyptic number.

It is an amenable number.

210101221249 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101221249 is an equidigital number, since it uses as much as digits as its factorization.

210101221249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 210101221249 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, two hundred forty-nine".