102100203 has 8 divisors (see below), whose sum is σ = 151259600. Its totient is φ = 68066784.

The previous prime is 102100199. The next prime is 102100211. The reversal of 102100203 is 302001201.

It is a happy number.

It is not a de Polignac number, because 102100203 - 2² = 102100199 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100223) 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, 1890718 + ... + 1890771.

It is an arithmetic number, because the mean of its divisors is an integer number (18907450).

Almost surely, 2^102100203 is an apocalyptic number.

102100203 is a deficient number, since it is larger than the sum of its proper divisors (49159397).

102100203 is an equidigital number, since it uses as much as digits as its factorization.

102100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781498 (or 3781492 counting only the distinct ones).

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

The square root of 102100203 is about 10104.4645083250. The cubic root of 102100203 is about 467.3858232042.

Adding to 102100203 its reverse (302001201), we get a palindrome (404101404).

The spelling of 102100203 in words is "one hundred two million, one hundred thousand, two hundred three".