20102122212187 has 2 divisors, whose sum is σ = 20102122212188. Its totient is φ = 20102122212186.

The previous prime is 20102122212181. The next prime is 20102122212209. The reversal of 20102122212187 is 78121222120102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102122212187 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102122212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051061106093 + 10051061106094.

It is an arithmetic number, because the mean of its divisors is an integer number (10051061106094).

Almost surely, 2^{20102122212187} is an apocalyptic number.

20102122212187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102122212187 is an equidigital number, since it uses as much as digits as its factorization.

20102122212187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

Adding to 20102122212187 its reverse (78121222120102), we get a palindrome (98223344332289).

The spelling of 20102122212187 in words is "twenty trillion, one hundred two billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eighty-seven".