20101021000087 has 2 divisors, whose sum is σ = 20101021000088. Its totient is φ = 20101021000086.

The previous prime is 20101021000019. The next prime is 20101021000127. The reversal of 20101021000087 is 78000012010102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101021000087 - 2¹⁹ = 20101020475799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101021000787) 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, 10050510500043 + 10050510500044.

It is an arithmetic number, because the mean of its divisors is an integer number (10050510500044).

Almost surely, 2^{20101021000087} is an apocalyptic number.

20101021000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101021000087 is an equidigital number, since it uses as much as digits as its factorization.

20101021000087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 20101021000087 its reverse (78000012010102), we get a palindrome (98101033010189).

The spelling of 20101021000087 in words is "twenty trillion, one hundred one billion, twenty-one million, eighty-seven", and thus it is an aban number.