1228980101 has 2 divisors, whose sum is σ = 1228980102. Its totient is φ = 1228980100.

The previous prime is 1228980029. The next prime is 1228980113. The reversal of 1228980101 is 1010898221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862831876 + 366148225 = 29374^2 + 19135^2 .

It is an emirp because it is prime and its reverse (1010898221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228980101 - 2¹⁴ = 1228963717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228980131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614490050 + 614490051.

It is an arithmetic number, because the mean of its divisors is an integer number (614490051).

Almost surely, 2^1228980101 is an apocalyptic number.

It is an amenable number.

1228980101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228980101 is an equidigital number, since it uses as much as digits as its factorization.

1228980101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 1228980101 is about 35056.8124763219. The cubic root of 1228980101 is about 1071.1450463702.

The spelling of 1228980101 in words is "one billion, two hundred twenty-eight million, nine hundred eighty thousand, one hundred one".