1211421230 has 16 divisors (see below), whose sum is σ = 2183343120. Its totient is φ = 483949632.

The previous prime is 1211421227. The next prime is 1211421257. The reversal of 1211421230 is 321241121.

It is a super-3 number, since 3×1211421230³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211421199 and 1211421208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69095 + ... + 84834.

It is an arithmetic number, because the mean of its divisors is an integer number (136458945).

Almost surely, 2^1211421230 is an apocalyptic number.

1211421230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211421230 is a deficient number, since it is larger than the sum of its proper divisors (971921890).

1211421230 is a wasteful number, since it uses less digits than its factorization.

1211421230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154723.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1211421230 is about 34805.4770115279. The cubic root of 1211421230 is about 1066.0192817541.

Adding to 1211421230 its reverse (321241121), we get a palindrome (1532662351).

The spelling of 1211421230 in words is "one billion, two hundred eleven million, four hundred twenty-one thousand, two hundred thirty".