20212111121207 has 2 divisors, whose sum is σ = 20212111121208. Its totient is φ = 20212111121206.

The previous prime is 20212111121197. The next prime is 20212111121269. The reversal of 20212111121207 is 70212111121202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212111121207 - 2¹⁰ = 20212111120183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212114121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106055560603 + 10106055560604.

It is an arithmetic number, because the mean of its divisors is an integer number (10106055560604).

Almost surely, 2^{20212111121207} is an apocalyptic number.

20212111121207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212111121207 is an equidigital number, since it uses as much as digits as its factorization.

20212111121207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 20212111121207 its reverse (70212111121202), we get a palindrome (90424222242409).

The spelling of 20212111121207 in words is "twenty trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred seven".