1021020550 has 96 divisors (see below), whose sum is σ = 2149576704. Its totient is φ = 357552000.

The previous prime is 1021020529. The next prime is 1021020551. The reversal of 1021020550 is 550201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021020551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2665659 + ... + 2666041.

It is an arithmetic number, because the mean of its divisors is an integer number (22391424).

Almost surely, 2^1021020550 is an apocalyptic number.

1021020550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021020550 is an abundant number, since it is smaller than the sum of its proper divisors (1128556154).

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

1021020550 is a wasteful number, since it uses less digits than its factorization.

1021020550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1021020550 is about 31953.4121808611. The cubic root of 1021020550 is about 1006.9583194868.

Adding to 1021020550 its reverse (550201201), we get a palindrome (1571221751).

The spelling of 1021020550 in words is "one billion, twenty-one million, twenty thousand, five hundred fifty".