20010021203 has 2 divisors, whose sum is σ = 20010021204. Its totient is φ = 20010021202.

The previous prime is 20010021197. The next prime is 20010021217. The reversal of 20010021203 is 30212001002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010021203 - 2¹⁰ = 20010020179 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005010601 + 10005010602.

It is an arithmetic number, because the mean of its divisors is an integer number (10005010602).

Almost surely, 2^20010021203 is an apocalyptic number.

20010021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010021203 is an equidigital number, since it uses as much as digits as its factorization.

20010021203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20010021203 its reverse (30212001002), we get a palindrome (50222022205).

The spelling of 20010021203 in words is "twenty billion, ten million, twenty-one thousand, two hundred three".