1214422661 has 2 divisors, whose sum is σ = 1214422662. Its totient is φ = 1214422660.

The previous prime is 1214422579. The next prime is 1214422667. The reversal of 1214422661 is 1662244121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1029190561 + 185232100 = 32081^2 + 13610^2 .

It is an emirp because it is prime and its reverse (1662244121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214422661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214422667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607211330 + 607211331.

It is an arithmetic number, because the mean of its divisors is an integer number (607211331).

Almost surely, 2^1214422661 is an apocalyptic number.

It is an amenable number.

1214422661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214422661 is an equidigital number, since it uses as much as digits as its factorization.

1214422661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 1214422661 is about 34848.5675602312. The cubic root of 1214422661 is about 1066.8989494892.

Adding to 1214422661 its reverse (1662244121), we get a palindrome (2876666782).

It can be divided in two parts, 12144226 and 61, that multiplied together give a triangular number (740797786 = T₃₈₄₉₁).

The spelling of 1214422661 in words is "one billion, two hundred fourteen million, four hundred twenty-two thousand, six hundred sixty-one".