1221441130 has 48 divisors (see below), whose sum is σ = 2754297000. Its totient is φ = 386563968.

The previous prime is 1221441121. The next prime is 1221441149. The reversal of 1221441130 is 311441221.

It can be written as a sum of positive squares in 4 ways, for example, as 394936129 + 826505001 = 19873^2 + 28749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221441098 and 1221441107.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89505 + ... + 102244.

Almost surely, 2^1221441130 is an apocalyptic number.

1221441130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221441130 is an abundant number, since it is smaller than the sum of its proper divisors (1532855870).

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

1221441130 is a wasteful number, since it uses less digits than its factorization.

1221441130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191783 (or 191776 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1221441130 is about 34949.1220204457. The cubic root of 1221441130 is about 1068.9502996335.

Adding to 1221441130 its reverse (311441221), we get a palindrome (1532882351).

Subtracting from 1221441130 its reverse (311441221), we obtain a palindrome (909999909).

The spelling of 1221441130 in words is "one billion, two hundred twenty-one million, four hundred forty-one thousand, one hundred thirty".