212401117 has 2 divisors, whose sum is σ = 212401118. Its totient is φ = 212401116.

The previous prime is 212401109. The next prime is 212401177. The reversal of 212401117 is 711104212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132227001 + 80174116 = 11499^2 + 8954^2 .

It is a cyclic number.

It is not a de Polignac number, because 212401117 - 2³ = 212401109 is a prime.

It is a super-2 number, since 2×212401117² = 90228469005695378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212401094 and 212401103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212401177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106200558 + 106200559.

It is an arithmetic number, because the mean of its divisors is an integer number (106200559).

Almost surely, 2^212401117 is an apocalyptic number.

It is an amenable number.

212401117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212401117 is an equidigital number, since it uses as much as digits as its factorization.

212401117 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 19.

The square root of 212401117 is about 14573.9876835408. The cubic root of 212401117 is about 596.6490206628.

Adding to 212401117 its reverse (711104212), we get a palindrome (923505329).

The spelling of 212401117 in words is "two hundred twelve million, four hundred one thousand, one hundred seventeen".