20767282121 has 2 divisors, whose sum is σ = 20767282122. Its totient is φ = 20767282120.

The previous prime is 20767282103. The next prime is 20767282139. The reversal of 20767282121 is 12128276702.

It is a balanced prime because it is at equal distance from previous prime (20767282103) and next prime (20767282139).

It can be written as a sum of positive squares in only one way, i.e., 18781332025 + 1985950096 = 137045^2 + 44564^2 .

It is a cyclic number.

It is not a de Polignac number, because 20767282121 - 2⁶ = 20767282057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20767282171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10383641060 + 10383641061.

It is an arithmetic number, because the mean of its divisors is an integer number (10383641061).

Almost surely, 2^20767282121 is an apocalyptic number.

It is an amenable number.

20767282121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20767282121 is an equidigital number, since it uses as much as digits as its factorization.

20767282121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 20767282121 in words is "twenty billion, seven hundred sixty-seven million, two hundred eighty-two thousand, one hundred twenty-one".