1021221130 has 16 divisors (see below), whose sum is σ = 1868333544. Its totient is φ = 401791680.

The previous prime is 1021221077. The next prime is 1021221133. The reversal of 1021221130 is 311221201.

1021221130 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 187224489 + 833996641 = 13683^2 + 28879^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021221130.

It is not an unprimeable number, because it can be changed into a prime (1021221133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836457 + ... + 837676.

Almost surely, 2^1021221130 is an apocalyptic number.

1021221130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021221130 is a deficient number, since it is larger than the sum of its proper divisors (847112414).

1021221130 is a wasteful number, since it uses less digits than its factorization.

1021221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674201.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1021221130 is about 31956.5506586678. The cubic root of 1021221130 is about 1007.0242543253.

Adding to 1021221130 its reverse (311221201), we get a palindrome (1332442331).

The spelling of 1021221130 in words is "one billion, twenty-one million, two hundred twenty-one thousand, one hundred thirty".