20112003320021 has 2 divisors, whose sum is σ = 20112003320022. Its totient is φ = 20112003320020.

The previous prime is 20112003319979. The next prime is 20112003320029. The reversal of 20112003320021 is 12002330021102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18456380695921 + 1655622624100 = 4296089^2 + 1286710^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112003320021 - 2³⁴ = 20094823450837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112003320029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056001660010 + 10056001660011.

It is an arithmetic number, because the mean of its divisors is an integer number (10056001660011).

Almost surely, 2^{20112003320021} is an apocalyptic number.

It is an amenable number.

20112003320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112003320021 is an equidigital number, since it uses as much as digits as its factorization.

20112003320021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20112003320021 its reverse (12002330021102), we get a palindrome (32114333341123).

The spelling of 20112003320021 in words is "twenty trillion, one hundred twelve billion, three million, three hundred twenty thousand, twenty-one".