1021023108 has 72 divisors (see below), whose sum is σ = 2960473152. Its totient is φ = 290647872.

The previous prime is 1021023079. The next prime is 1021023109. The reversal of 1021023108 is 8013201201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021023109) 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, 62491 + ... + 77117.

Almost surely, 2^1021023108 is an apocalyptic number.

1021023108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021023108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480236576).

1021023108 is an abundant number, since it is smaller than the sum of its proper divisors (1939450044).

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

1021023108 is a wasteful number, since it uses less digits than its factorization.

1021023108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14921 (or 14916 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1021023108 is about 31953.4522078601. The cubic root of 1021023108 is about 1006.9591604092.

Adding to 1021023108 its reverse (8013201201), we get a palindrome (9034224309).

The spelling of 1021023108 in words is "one billion, twenty-one million, twenty-three thousand, one hundred eight".