10200102020 has 12 divisors (see below), whose sum is σ = 21420214284. Its totient is φ = 4080040800.

The previous prime is 10200102013. The next prime is 10200102037. The reversal of 10200102020 is 2020100201.

It can be written as a sum of positive squares in 2 ways, for example, as 3239203396 + 6960898624 = 56914^2 + 83432^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10200101989 and 10200102007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255002531 + ... + 255002570.

It is an arithmetic number, because the mean of its divisors is an integer number (1785017857).

Almost surely, 2^10200102020 is an apocalyptic number.

10200102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10200102020 is an abundant number, since it is smaller than the sum of its proper divisors (11220112264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10200102020 is a wasteful number, since it uses less digits than its factorization.

10200102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510005110 (or 510005108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 10200102020 its reverse (2020100201), we get a palindrome (12220202221).

The spelling of 10200102020 in words is "ten billion, two hundred million, one hundred two thousand, twenty".