1211112020117 has 2 divisors, whose sum is σ = 1211112020118. Its totient is φ = 1211112020116.

The previous prime is 1211112020087. The next prime is 1211112020141. The reversal of 1211112020117 is 7110202111121.

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., 963870369361 + 247241650756 = 981769^2 + 497234^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211112020117 - 2¹² = 1211112016021 is a prime.

It is a super-2 number, since 2×1211112020117² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211112020147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605556010058 + 605556010059.

It is an arithmetic number, because the mean of its divisors is an integer number (605556010059).

Almost surely, 2^{1211112020117} is an apocalyptic number.

It is an amenable number.

1211112020117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211112020117 is an equidigital number, since it uses as much as digits as its factorization.

1211112020117 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 20.

Adding to 1211112020117 its reverse (7110202111121), we get a palindrome (8321314131238).

The spelling of 1211112020117 in words is "one trillion, two hundred eleven billion, one hundred twelve million, twenty thousand, one hundred seventeen".