1021012100203 has 2 divisors, whose sum is σ = 1021012100204. Its totient is φ = 1021012100202.

The previous prime is 1021012100201. The next prime is 1021012100233. The reversal of 1021012100203 is 3020012101201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021012100203 - 2¹ = 1021012100201 is a prime.

Together with 1021012100201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021012100201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510506050101 + 510506050102.

It is an arithmetic number, because the mean of its divisors is an integer number (510506050102).

Almost surely, 2^{1021012100203} is an apocalyptic number.

1021012100203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021012100203 is an equidigital number, since it uses as much as digits as its factorization.

1021012100203 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 13.

Adding to 1021012100203 its reverse (3020012101201), we get a palindrome (4041024201404).

The spelling of 1021012100203 in words is "one trillion, twenty-one billion, twelve million, one hundred thousand, two hundred three".