20201121122087 has 2 divisors, whose sum is σ = 20201121122088. Its totient is φ = 20201121122086.

The previous prime is 20201121122047. The next prime is 20201121122089. The reversal of 20201121122087 is 78022112110202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20201121122087 - 2²⁴ = 20201104344871 is a prime.

Together with 20201121122089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201121122089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100560561043 + 10100560561044.

It is an arithmetic number, because the mean of its divisors is an integer number (10100560561044).

Almost surely, 2^{20201121122087} is an apocalyptic number.

20201121122087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201121122087 is an equidigital number, since it uses as much as digits as its factorization.

20201121122087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 20201121122087 its reverse (78022112110202), we get a palindrome (98223233232289).

The spelling of 20201121122087 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, eighty-seven".