1212220117 has 2 divisors, whose sum is σ = 1212220118. Its totient is φ = 1212220116.

The previous prime is 1212220111. The next prime is 1212220123. The reversal of 1212220117 is 7110222121.

It is a balanced prime because it is at equal distance from previous prime (1212220111) and next prime (1212220123).

It can be written as a sum of positive squares in only one way, i.e., 1177244721 + 34975396 = 34311^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212220117 - 2⁷ = 1212219989 is a prime.

It is a super-2 number, since 2×1212220117² = 2938955224118987378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212220094 and 1212220103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606110058 + 606110059.

It is an arithmetic number, because the mean of its divisors is an integer number (606110059).

Almost surely, 2^1212220117 is an apocalyptic number.

It is an amenable number.

1212220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212220117 is an equidigital number, since it uses as much as digits as its factorization.

1212220117 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 1212220117 is about 34816.9515753462. The cubic root of 1212220117 is about 1066.2535635458.

Adding to 1212220117 its reverse (7110222121), we get a palindrome (8322442238).

The spelling of 1212220117 in words is "one billion, two hundred twelve million, two hundred twenty thousand, one hundred seventeen".