20212123100087 has 2 divisors, whose sum is σ = 20212123100088. Its totient is φ = 20212123100086.

The previous prime is 20212123100083. The next prime is 20212123100107. The reversal of 20212123100087 is 78000132121202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212123100087 - 2² = 20212123100083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212123100083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106061550043 + 10106061550044.

It is an arithmetic number, because the mean of its divisors is an integer number (10106061550044).

Almost surely, 2^{20212123100087} is an apocalyptic number.

20212123100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212123100087 is an equidigital number, since it uses as much as digits as its factorization.

20212123100087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 20212123100087 its reverse (78000132121202), we get a palindrome (98212255221289).

The spelling of 20212123100087 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-three million, one hundred thousand, eighty-seven".