1020210100 has 72 divisors (see below), whose sum is σ = 2724770048. Its totient is φ = 322876800.

The previous prime is 1020210089. The next prime is 1020210101. The reversal of 1020210100 is 10120201.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020210101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46956 + ... + 65155.

Almost surely, 2^1020210100 is an apocalyptic number.

1020210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020210100 is an abundant number, since it is smaller than the sum of its proper divisors (1704559948).

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

1020210100 is a wasteful number, since it uses less digits than its factorization.

1020210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112145 (or 112138 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1020210100 is about 31940.7279190691. The cubic root of 1020210100 is about 1006.6918196620.

Adding to 1020210100 its reverse (10120201), we get a palindrome (1030330301).

It can be divided in two parts, 10202 and 10100, that added together give a palindrome (20302).

The spelling of 1020210100 in words is "one billion, twenty million, two hundred ten thousand, one hundred".