1021012110 has 72 divisors (see below), whose sum is σ = 2701216440. Its totient is φ = 267573024.

The previous prime is 1021012103. The next prime is 1021012121. The reversal of 1021012110 is 112101201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021012092 and 1021012101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 311661 + ... + 314919.

It is an arithmetic number, because the mean of its divisors is an integer number (37516895).

Almost surely, 2^1021012110 is an apocalyptic number.

1021012110 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 1021012110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350608220).

1021012110 is an abundant number, since it is smaller than the sum of its proper divisors (1680204330).

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

1021012110 is a wasteful number, since it uses less digits than its factorization.

1021012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390 (or 3328 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1021012110 is about 31953.2801133154. The cubic root of 1021012110 is about 1006.9555448931.

Adding to 1021012110 its reverse (112101201), we get a palindrome (1133113311).

The spelling of 1021012110 in words is "one billion, twenty-one million, twelve thousand, one hundred ten".