2002110011821 has 2 divisors, whose sum is σ = 2002110011822. Its totient is φ = 2002110011820.

The previous prime is 2002110011813. The next prime is 2002110011827. The reversal of 2002110011821 is 1281100112002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1990317137796 + 11792874025 = 1410786^2 + 108595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002110011821 - 2³ = 2002110011813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002110011827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001055005910 + 1001055005911.

It is an arithmetic number, because the mean of its divisors is an integer number (1001055005911).

Almost surely, 2^{2002110011821} is an apocalyptic number.

It is an amenable number.

2002110011821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002110011821 is an equidigital number, since it uses as much as digits as its factorization.

2002110011821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 2002110011821 its reverse (1281100112002), we get a palindrome (3283210123823).

The spelling of 2002110011821 in words is "two trillion, two billion, one hundred ten million, eleven thousand, eight hundred twenty-one".