20201121122047 has 2 divisors, whose sum is σ = 20201121122048. Its totient is φ = 20201121122046.

The previous prime is 20201121122033. The next prime is 20201121122087. The reversal of 20201121122047 is 74022112110202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201121122047 is a prime.

It is a super-2 number, since 2×20201121122047² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201121122027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100560561023 + 10100560561024.

It is an arithmetic number, because the mean of its divisors is an integer number (10100560561024).

Almost surely, 2^{20201121122047} is an apocalyptic number.

20201121122047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201121122047 is an equidigital number, since it uses as much as digits as its factorization.

20201121122047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 20201121122047 its reverse (74022112110202), we get a palindrome (94223233232249).

The spelling of 20201121122047 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, forty-seven".