1020100203 has 8 divisors (see below), whose sum is σ = 1511259600. Its totient is φ = 680066784.

The previous prime is 1020100189. The next prime is 1020100217. The reversal of 1020100203 is 3020010201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020100189) and next prime (1020100217).

It is not a de Polignac number, because 1020100203 - 2⁵ = 1020100171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020102203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18890718 + ... + 18890771.

It is an arithmetic number, because the mean of its divisors is an integer number (188907450).

Almost surely, 2^1020100203 is an apocalyptic number.

1020100203 is a deficient number, since it is larger than the sum of its proper divisors (491159397).

1020100203 is an equidigital number, since it uses as much as digits as its factorization.

1020100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37781498 (or 37781492 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1020100203 is about 31939.0075456330. The cubic root of 1020100203 is about 1006.6556714270.

Adding to 1020100203 its reverse (3020010201), we get a palindrome (4040110404).

The spelling of 1020100203 in words is "one billion, twenty million, one hundred thousand, two hundred three".