20100021202043 has 2 divisors, whose sum is σ = 20100021202044. Its totient is φ = 20100021202042.

The previous prime is 20100021202007. The next prime is 20100021202111. The reversal of 20100021202043 is 34020212000102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100021202043 - 2¹² = 20100021197947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100021207043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050010601021 + 10050010601022.

It is an arithmetic number, because the mean of its divisors is an integer number (10050010601022).

Almost surely, 2^{20100021202043} is an apocalyptic number.

20100021202043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100021202043 is an equidigital number, since it uses as much as digits as its factorization.

20100021202043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20100021202043 its reverse (34020212000102), we get a palindrome (54120233202145).

The spelling of 20100021202043 in words is "twenty trillion, one hundred billion, twenty-one million, two hundred two thousand, forty-three".