1021001010 has 64 divisors (see below), whose sum is σ = 2504089728. Its totient is φ = 266333184.

The previous prime is 1021000963. The next prime is 1021001029. The reversal of 1021001010 is 101001201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1021001010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687729 + ... + 689211.

It is an arithmetic number, because the mean of its divisors is an integer number (39126402).

Almost surely, 2^1021001010 is an apocalyptic number.

1021001010 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 1021001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252044864).

1021001010 is an abundant number, since it is smaller than the sum of its proper divisors (1483088718).

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

1021001010 is a wasteful number, since it uses less digits than its factorization.

1021001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

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

The square root of 1021001010 is about 31953.1064217550. The cubic root of 1021001010 is about 1006.9518958188.

Adding to 1021001010 its reverse (101001201), we get a palindrome (1122002211).

The spelling of 1021001010 in words is "one billion, twenty-one million, one thousand, ten".