1021100010 has 128 divisors (see below), whose sum is σ = 2919628800. Its totient is φ = 223637760.

The previous prime is 1021100009. The next prime is 1021100011. The reversal of 1021100010 is 100011201.

It is an interprime number because it is at equal distance from previous prime (1021100009) and next prime (1021100011).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (1021100011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 708871 + ... + 710309.

It is an arithmetic number, because the mean of its divisors is an integer number (22809600).

Almost surely, 2^1021100010 is an apocalyptic number.

1021100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021100010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459814400).

1021100010 is an abundant number, since it is smaller than the sum of its proper divisors (1898528790).

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

1021100010 is a wasteful number, since it uses less digits than its factorization.

1021100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1021100010 is about 31954.6555293591. The cubic root of 1021100010 is about 1006.9844406824.

Adding to 1021100010 its reverse (100011201), we get a palindrome (1121111211).

The spelling of 1021100010 in words is "one billion, twenty-one million, one hundred thousand, ten".