102020100003 has 12 divisors (see below), whose sum is σ = 147402339448. Its totient is φ = 67994951040.

The previous prime is 102020099989. The next prime is 102020100071. The reversal of 102020100003 is 300001020201.

It is a happy number.

It is not a de Polignac number, because 102020100003 - 2⁶ = 102020099939 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 (102020100503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1502350 + ... + 1568787.

Almost surely, 2^102020100003 is an apocalyptic number.

102020100003 is a deficient number, since it is larger than the sum of its proper divisors (45382239445).

102020100003 is a wasteful number, since it uses less digits than its factorization.

102020100003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074834 (or 3074831 counting only the distinct ones).

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

Adding to 102020100003 its reverse (300001020201), we get a palindrome (402021120204).

The spelling of 102020100003 in words is "one hundred two billion, twenty million, one hundred thousand, three".