202120001117 has 2 divisors, whose sum is σ = 202120001118. Its totient is φ = 202120001116.

The previous prime is 202120001107. The next prime is 202120001159. The reversal of 202120001117 is 711100021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115677532996 + 86442468121 = 340114^2 + 294011^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120001117 - 2⁸ = 202120000861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202120001095 and 202120001104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202120001107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060000558 + 101060000559.

It is an arithmetic number, because the mean of its divisors is an integer number (101060000559).

Almost surely, 2^202120001117 is an apocalyptic number.

It is an amenable number.

202120001117 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120001117 is an equidigital number, since it uses as much as digits as its factorization.

202120001117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 202120001117 its reverse (711100021202), we get a palindrome (913220022319).

The spelling of 202120001117 in words is "two hundred two billion, one hundred twenty million, one thousand, one hundred seventeen".