20212001211001 has 2 divisors, whose sum is σ = 20212001211002. Its totient is φ = 20212001211000.

The previous prime is 20212001210911. The next prime is 20212001211007. The reversal of 20212001211001 is 10011210021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17380602690025 + 2831398520976 = 4169005^2 + 1682676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212001211001 - 2²¹ = 20211999113849 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212001211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106000605500 + 10106000605501.

It is an arithmetic number, because the mean of its divisors is an integer number (10106000605501).

Almost surely, 2^{20212001211001} is an apocalyptic number.

It is an amenable number.

20212001211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212001211001 is an equidigital number, since it uses as much as digits as its factorization.

20212001211001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20212001211001 its reverse (10011210021202), we get a palindrome (30223211232203).

The spelling of 20212001211001 in words is "twenty trillion, two hundred twelve billion, one million, two hundred eleven thousand, one".