1242114221 has 2 divisors, whose sum is σ = 1242114222. Its totient is φ = 1242114220.

The previous prime is 1242114191. The next prime is 1242114233. The reversal of 1242114221 is 1224112421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153960900 + 88153321 = 33970^2 + 9389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242114221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242114193 and 1242114202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242114271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621057110 + 621057111.

It is an arithmetic number, because the mean of its divisors is an integer number (621057111).

Almost surely, 2^1242114221 is an apocalyptic number.

It is an amenable number.

1242114221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242114221 is an equidigital number, since it uses as much as digits as its factorization.

1242114221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 20.

The square root of 1242114221 is about 35243.6408590259. The cubic root of 1242114221 is about 1074.9473119300.

Adding to 1242114221 its reverse (1224112421), we get a palindrome (2466226642).

The spelling of 1242114221 in words is "one billion, two hundred forty-two million, one hundred fourteen thousand, two hundred twenty-one".