2021211210001 has 2 divisors, whose sum is σ = 2021211210002. Its totient is φ = 2021211210000.

The previous prime is 2021211209989. The next prime is 2021211210019. The reversal of 2021211210001 is 1000121121202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1466072964225 + 555138245776 = 1210815^2 + 745076^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021211210001 - 2⁷ = 2021211209873 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021211210101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010605605000 + 1010605605001.

It is an arithmetic number, because the mean of its divisors is an integer number (1010605605001).

Almost surely, 2^{2021211210001} is an apocalyptic number.

It is an amenable number.

2021211210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021211210001 is an equidigital number, since it uses as much as digits as its factorization.

2021211210001 is an evil number, because the sum of its binary digits is even.

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

Adding to 2021211210001 its reverse (1000121121202), we get a palindrome (3021332331203).

The spelling of 2021211210001 in words is "two trillion, twenty-one billion, two hundred eleven million, two hundred ten thousand, one".