1220211110009 has 2 divisors, whose sum is σ = 1220211110010. Its totient is φ = 1220211110008.

The previous prime is 1220211109993. The next prime is 1220211110029. The reversal of 1220211110009 is 9000111120221.

It is an a-pointer prime, because the next prime (1220211110029) can be obtained adding 1220211110009 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., 711328620409 + 508882489600 = 843403^2 + 713360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220211110009 - 2⁴ = 1220211109993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220211110029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610105555004 + 610105555005.

It is an arithmetic number, because the mean of its divisors is an integer number (610105555005).

Almost surely, 2^{1220211110009} is an apocalyptic number.

It is an amenable number.

1220211110009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220211110009 is an equidigital number, since it uses as much as digits as its factorization.

1220211110009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1220211110009 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred ten thousand, nine".