20011211202001 has 2 divisors, whose sum is σ = 20011211202002. Its totient is φ = 20011211202000.

The previous prime is 20011211201941. The next prime is 20011211202049. The reversal of 20011211202001 is 10020211211002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19019193210000 + 992017992001 = 4361100^2 + 996001^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011211202001 - 2⁹ = 20011211201489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011211206001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005605601000 + 10005605601001.

It is an arithmetic number, because the mean of its divisors is an integer number (10005605601001).

Almost surely, 2^{20011211202001} is an apocalyptic number.

It is an amenable number.

20011211202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011211202001 is an equidigital number, since it uses as much as digits as its factorization.

20011211202001 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 20011211202001 its reverse (10020211211002), we get a palindrome (30031422413003).

Subtracting from 20011211202001 its reverse (10020211211002), we obtain a palindrome (9990999990999).

The spelling of 20011211202001 in words is "twenty trillion, eleven billion, two hundred eleven million, two hundred two thousand, one".