20001211020001 has 2 divisors, whose sum is σ = 20001211020002. Its totient is φ = 20001211020000.

The previous prime is 20001211019989. The next prime is 20001211020013. The reversal of 20001211020001 is 10002011210002.

It is a balanced prime because it is at equal distance from previous prime (20001211019989) and next prime (20001211020013).

It can be written as a sum of positive squares in only one way, i.e., 19961460230625 + 39750789376 = 4467825^2 + 199376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001211020001 - 2³⁵ = 19966851281633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001211020001.

It is not a weakly prime, because it can be changed into another prime (20001211029001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605510000 + 10000605510001.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605510001).

Almost surely, 2^{20001211020001} is an apocalyptic number.

It is an amenable number.

20001211020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001211020001 is an equidigital number, since it uses as much as digits as its factorization.

20001211020001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001211020001 its reverse (10002011210002), we get a palindrome (30003222230003).

The spelling of 20001211020001 in words is "twenty trillion, one billion, two hundred eleven million, twenty thousand, one".