1216026634601 has 2 divisors, whose sum is σ = 1216026634602. Its totient is φ = 1216026634600.

The previous prime is 1216026634579. The next prime is 1216026634649. The reversal of 1216026634601 is 1064366206121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 911979160576 + 304047474025 = 954976^2 + 551405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216026634601 - 2³⁸ = 941148727657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216026639601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608013317300 + 608013317301.

It is an arithmetic number, because the mean of its divisors is an integer number (608013317301).

Almost surely, 2^{1216026634601} is an apocalyptic number.

It is an amenable number.

1216026634601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216026634601 is an equidigital number, since it uses as much as digits as its factorization.

1216026634601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 1216026634601 in words is "one trillion, two hundred sixteen billion, twenty-six million, six hundred thirty-four thousand, six hundred one".