1216512701 has 2 divisors, whose sum is σ = 1216512702. Its totient is φ = 1216512700.

The previous prime is 1216512683. The next prime is 1216512719. The reversal of 1216512701 is 1072156121.

It is a balanced prime because it is at equal distance from previous prime (1216512683) and next prime (1216512719).

It can be written as a sum of positive squares in only one way, i.e., 895565476 + 320947225 = 29926^2 + 17915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216512701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216512721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608256350 + 608256351.

It is an arithmetic number, because the mean of its divisors is an integer number (608256351).

Almost surely, 2^1216512701 is an apocalyptic number.

It is an amenable number.

1216512701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216512701 is an equidigital number, since it uses as much as digits as its factorization.

1216512701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 1216512701 is about 34878.5421283631. The cubic root of 1216512701 is about 1067.5106485198.

Adding to 1216512701 its reverse (1072156121), we get a palindrome (2288668822).

The spelling of 1216512701 in words is "one billion, two hundred sixteen million, five hundred twelve thousand, seven hundred one".