1221424030 has 64 divisors (see below), whose sum is σ = 2385028800. Its totient is φ = 449326080.

The previous prime is 1221424027. The next prime is 1221424031. The reversal of 1221424030 is 304241221.

It is a super-2 number, since 2×1221424030² = 2983753322122881800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221423989 and 1221424007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221424031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510076 + ... + 512464.

It is an arithmetic number, because the mean of its divisors is an integer number (37266075).

Almost surely, 2^1221424030 is an apocalyptic number.

1221424030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221424030 is a deficient number, since it is larger than the sum of its proper divisors (1163604770).

1221424030 is a wasteful number, since it uses less digits than its factorization.

1221424030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1221424030 is about 34948.8773782506. The cubic root of 1221424030 is about 1068.9453112268.

Adding to 1221424030 its reverse (304241221), we get a palindrome (1525665251).

The spelling of 1221424030 in words is "one billion, two hundred twenty-one million, four hundred twenty-four thousand, thirty".