2010001220021 has 2 divisors, whose sum is σ = 2010001220022. Its totient is φ = 2010001220020.

The previous prime is 2010001219921. The next prime is 2010001220047. The reversal of 2010001220021 is 1200221000102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108469959921 + 901531260100 = 1052839^2 + 949490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010001220021 - 2¹⁰ = 2010001218997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2010001219984 and 2010001220011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010007220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005000610010 + 1005000610011.

It is an arithmetic number, because the mean of its divisors is an integer number (1005000610011).

Almost surely, 2^{2010001220021} is an apocalyptic number.

It is an amenable number.

2010001220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010001220021 is an equidigital number, since it uses as much as digits as its factorization.

2010001220021 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 11.

Adding to 2010001220021 its reverse (1200221000102), we get a palindrome (3210222220123).

The spelling of 2010001220021 in words is "two trillion, ten billion, one million, two hundred twenty thousand, twenty-one".