101220011309 has 2 divisors, whose sum is σ = 101220011310. Its totient is φ = 101220011308.

The previous prime is 101220011303. The next prime is 101220011329. The reversal of 101220011309 is 903110022101.

It is an a-pointer prime, because the next prime (101220011329) can be obtained adding 101220011309 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52522555684 + 48697455625 = 229178^2 + 220675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101220011309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220011303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610005654 + 50610005655.

It is an arithmetic number, because the mean of its divisors is an integer number (50610005655).

Almost surely, 2^101220011309 is an apocalyptic number.

It is an amenable number.

101220011309 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220011309 is an equidigital number, since it uses as much as digits as its factorization.

101220011309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 101220011309 in words is "one hundred one billion, two hundred twenty million, eleven thousand, three hundred nine".