2021213722901 has 2 divisors, whose sum is σ = 2021213722902. Its totient is φ = 2021213722900.

The previous prime is 2021213722873. The next prime is 2021213722919. The reversal of 2021213722901 is 1092273121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1921414594801 + 99799128100 = 1386151^2 + 315910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021213722901 - 2¹⁸ = 2021213460757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021213722961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010606861450 + 1010606861451.

It is an arithmetic number, because the mean of its divisors is an integer number (1010606861451).

Almost surely, 2^{2021213722901} is an apocalyptic number.

It is an amenable number.

2021213722901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021213722901 is an equidigital number, since it uses as much as digits as its factorization.

2021213722901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 2021213722901 in words is "two trillion, twenty-one billion, two hundred thirteen million, seven hundred twenty-two thousand, nine hundred one".