20200102121117 has 2 divisors, whose sum is σ = 20200102121118. Its totient is φ = 20200102121116.

The previous prime is 20200102121081. The next prime is 20200102121141. The reversal of 20200102121117 is 71112120100202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19072383433636 + 1127718687481 = 4367194^2 + 1061941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200102121117 - 2¹² = 20200102117021 is a prime.

It is a super-3 number, since 3×20200102121117³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200102121917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100051060558 + 10100051060559.

It is an arithmetic number, because the mean of its divisors is an integer number (10100051060559).

Almost surely, 2^{20200102121117} is an apocalyptic number.

It is an amenable number.

20200102121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200102121117 is an equidigital number, since it uses as much as digits as its factorization.

20200102121117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 20200102121117 its reverse (71112120100202), we get a palindrome (91312222221319).

The spelling of 20200102121117 in words is "twenty trillion, two hundred billion, one hundred two million, one hundred twenty-one thousand, one hundred seventeen".