20021100021203 has 2 divisors, whose sum is σ = 20021100021204. Its totient is φ = 20021100021202.

The previous prime is 20021100021193. The next prime is 20021100021257. The reversal of 20021100021203 is 30212000112002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021100021203 - 2²⁸ = 20020831585747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20021100021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010550010601 + 10010550010602.

It is an arithmetic number, because the mean of its divisors is an integer number (10010550010602).

Almost surely, 2^{20021100021203} is an apocalyptic number.

20021100021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021100021203 is an equidigital number, since it uses as much as digits as its factorization.

20021100021203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021100021203 its reverse (30212000112002), we get a palindrome (50233100133205).

The spelling of 20021100021203 in words is "twenty trillion, twenty-one billion, one hundred million, twenty-one thousand, two hundred three".