1020010100 has 18 divisors (see below), whose sum is σ = 2213422134. Its totient is φ = 408004000.

The previous prime is 1020010099. The next prime is 1020010163. The reversal of 1020010100 is 10100201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2910436 + 1017099664 = 1706^2 + 31892^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5099951 + ... + 5100150.

Almost surely, 2^1020010100 is an apocalyptic number.

1020010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020010100 is an abundant number, since it is smaller than the sum of its proper divisors (1193412034).

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

1020010100 is a wasteful number, since it uses less digits than its factorization.

1020010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200115 (or 10200108 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1020010100 is about 31937.5969665847. The cubic root of 1020010100 is about 1006.6260320620.

Adding to 1020010100 its reverse (10100201), we get a palindrome (1030110301).

The spelling of 1020010100 in words is "one billion, twenty million, ten thousand, one hundred".