20210122112153 has 2 divisors, whose sum is σ = 20210122112154. Its totient is φ = 20210122112152.

The previous prime is 20210122112093. The next prime is 20210122112179. The reversal of 20210122112153 is 35121122101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19372911752089 + 837210360064 = 4401467^2 + 914992^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210122112153 - 2¹⁶ = 20210122046617 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210122112053) 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, 10105061056076 + 10105061056077.

It is an arithmetic number, because the mean of its divisors is an integer number (10105061056077).

Almost surely, 2^{20210122112153} is an apocalyptic number.

It is an amenable number.

20210122112153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210122112153 is an equidigital number, since it uses as much as digits as its factorization.

20210122112153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 20210122112153 its reverse (35121122101202), we get a palindrome (55331244213355).

The spelling of 20210122112153 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, one hundred twelve thousand, one hundred fifty-three".