101212249 has 2 divisors, whose sum is σ = 101212250. Its totient is φ = 101212248.

The previous prime is 101212219. The next prime is 101212253. The reversal of 101212249 is 942212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101203600 + 8649 = 10060^2 + 93^2 .

It is an emirp because it is prime and its reverse (942212101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101212249 - 2¹⁷ = 101081177 is a prime.

It is not a weakly prime, because it can be changed into another prime (101212219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606124 + 50606125.

It is an arithmetic number, because the mean of its divisors is an integer number (50606125).

Almost surely, 2^101212249 is an apocalyptic number.

It is an amenable number.

101212249 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212249 is an equidigital number, since it uses as much as digits as its factorization.

101212249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 101212249 is about 10060.4298615914. The cubic root of 101212249 is about 466.0269422062.

The spelling of 101212249 in words is "one hundred one million, two hundred twelve thousand, two hundred forty-nine".