1021020030 has 96 divisors (see below), whose sum is σ = 2751840000. Its totient is φ = 262379520.

The previous prime is 1021020029. The next prime is 1021020041. The reversal of 1021020030 is 300201201.

It is a happy number.

It is a super-2 number, since 2×1021020030² = 2084963803322401800, which contains 22 as substring.

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 = 1021019994 and 1021020021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 816846 + ... + 818094.

It is an arithmetic number, because the mean of its divisors is an integer number (28665000).

Almost surely, 2^1021020030 is an apocalyptic number.

1021020030 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 1021020030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375920000).

1021020030 is an abundant number, since it is smaller than the sum of its proper divisors (1730819970).

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

1021020030 is a wasteful number, since it uses less digits than its factorization.

1021020030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1021020030 is about 31953.4040440138. The cubic root of 1021020030 is about 1006.9581485407.

Adding to 1021020030 its reverse (300201201), we get a palindrome (1321221231).

The spelling of 1021020030 in words is "one billion, twenty-one million, twenty thousand, thirty".