1242221130 has 64 divisors (see below), whose sum is σ = 3334636800. Its totient is φ = 329054400.

The previous prime is 1242221111. The next prime is 1242221153. The reversal of 1242221130 is 311222421.

It is a happy number.

1242221130 is a `hidden beast` number, since 1 + 2 + 422 + 211 + 30 = 666.

It is a super-2 number, since 2×1242221130² = 3086226671636953800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 25536 + ... + 56004.

It is an arithmetic number, because the mean of its divisors is an integer number (52103700).

Almost surely, 2^1242221130 is an apocalyptic number.

1242221130 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 1242221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667318400).

1242221130 is an abundant number, since it is smaller than the sum of its proper divisors (2092415670).

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

1242221130 is a wasteful number, since it uses less digits than its factorization.

1242221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30636 (or 30630 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1242221130 is about 35245.1575397245. The cubic root of 1242221130 is about 1074.9781513497.

Adding to 1242221130 its reverse (311222421), we get a palindrome (1553443551).

The spelling of 1242221130 in words is "one billion, two hundred forty-two million, two hundred twenty-one thousand, one hundred thirty".