20012102249 has 2 divisors, whose sum is σ = 20012102250. Its totient is φ = 20012102248.

The previous prime is 20012102167. The next prime is 20012102291. The reversal of 20012102249 is 94220121002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13681513024 + 6330589225 = 116968^2 + 79565^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012102249 - 2²⁴ = 19995325033 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012105249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006051124 + 10006051125.

It is an arithmetic number, because the mean of its divisors is an integer number (10006051125).

Almost surely, 2^20012102249 is an apocalyptic number.

It is an amenable number.

20012102249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012102249 is an equidigital number, since it uses as much as digits as its factorization.

20012102249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 20012102249 in words is "twenty billion, twelve million, one hundred two thousand, two hundred forty-nine".