20122100222009 has 2 divisors, whose sum is σ = 20122100222010. Its totient is φ = 20122100222008.

The previous prime is 20122100221997. The next prime is 20122100222027. The reversal of 20122100222009 is 90022200122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20023521805225 + 98578416784 = 4474765^2 + 313972^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122100222009 - 2⁸ = 20122100221753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122100222069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061050111004 + 10061050111005.

It is an arithmetic number, because the mean of its divisors is an integer number (10061050111005).

Almost surely, 2^{20122100222009} is an apocalyptic number.

It is an amenable number.

20122100222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122100222009 is an equidigital number, since it uses as much as digits as its factorization.

20122100222009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 20122100222009 in words is "twenty trillion, one hundred twenty-two billion, one hundred million, two hundred twenty-two thousand, nine".