20012222011 has 2 divisors, whose sum is σ = 20012222012. Its totient is φ = 20012222010.

The previous prime is 20012221997. The next prime is 20012222029. The reversal of 20012222011 is 11022221002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012222011 - 2⁷ = 20012221883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012221982 and 20012222000.

It is not a weakly prime, because it can be changed into another prime (20012222051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006111005 + 10006111006.

It is an arithmetic number, because the mean of its divisors is an integer number (10006111006).

Almost surely, 2^20012222011 is an apocalyptic number.

20012222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012222011 is an equidigital number, since it uses as much as digits as its factorization.

20012222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20012222011 its reverse (11022221002), we get a palindrome (31034443013).

The spelling of 20012222011 in words is "twenty billion, twelve million, two hundred twenty-two thousand, eleven".