20200121222153 has 2 divisors, whose sum is σ = 20200121222154. Its totient is φ = 20200121222152.

The previous prime is 20200121222137. The next prime is 20200121222243. The reversal of 20200121222153 is 35122212100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15798462673984 + 4401658548169 = 3974728^2 + 2098013^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200121222153 - 2⁴ = 20200121222137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200121222653) 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, 10100060611076 + 10100060611077.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060611077).

Almost surely, 2^{20200121222153} is an apocalyptic number.

It is an amenable number.

20200121222153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200121222153 is an equidigital number, since it uses as much as digits as its factorization.

20200121222153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20200121222153 its reverse (35122212100202), we get a palindrome (55322333322355).

The spelling of 20200121222153 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred fifty-three".