1227069616021 has 2 divisors, whose sum is σ = 1227069616022. Its totient is φ = 1227069616020.

The previous prime is 1227069615977. The next prime is 1227069616039. The reversal of 1227069616021 is 1206169607221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911690780625 + 315378835396 = 954825^2 + 561586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227069616021 - 2⁹ = 1227069615509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227069616621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613534808010 + 613534808011.

It is an arithmetic number, because the mean of its divisors is an integer number (613534808011).

Almost surely, 2^{1227069616021} is an apocalyptic number.

It is an amenable number.

1227069616021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227069616021 is an equidigital number, since it uses as much as digits as its factorization.

1227069616021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1227069616021 in words is "one trillion, two hundred twenty-seven billion, sixty-nine million, six hundred sixteen thousand, twenty-one".