2021211020117 has 2 divisors, whose sum is σ = 2021211020118. Its totient is φ = 2021211020116.

The previous prime is 2021211020063. The next prime is 2021211020203. The reversal of 2021211020117 is 7110201121202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1636580345521 + 384630674596 = 1279289^2 + 620186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021211020117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021211020617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010605510058 + 1010605510059.

It is an arithmetic number, because the mean of its divisors is an integer number (1010605510059).

Almost surely, 2^{2021211020117} is an apocalyptic number.

It is an amenable number.

2021211020117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021211020117 is an equidigital number, since it uses as much as digits as its factorization.

2021211020117 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021211020117 its reverse (7110201121202), we get a palindrome (9131412141319).

The spelling of 2021211020117 in words is "two trillion, twenty-one billion, two hundred eleven million, twenty thousand, one hundred seventeen".