1211434430 has 32 divisors (see below), whose sum is σ = 2253201408. Its totient is φ = 468468000.

The previous prime is 1211434417. The next prime is 1211434481. The reversal of 1211434430 is 344341121.

It is a super-3 number, since 3×1211434430³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211434396 and 1211434405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603809 + ... + 605811.

It is an arithmetic number, because the mean of its divisors is an integer number (70412544).

Almost surely, 2^1211434430 is an apocalyptic number.

1211434430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211434430 is a deficient number, since it is larger than the sum of its proper divisors (1041766978).

1211434430 is a wasteful number, since it uses less digits than its factorization.

1211434430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1211434430 is about 34805.6666363395. Note that the first 4 decimals coincide. The cubic root of 1211434430 is about 1066.0231536260.

Adding to 1211434430 its reverse (344341121), we get a palindrome (1555775551).

The spelling of 1211434430 in words is "one billion, two hundred eleven million, four hundred thirty-four thousand, four hundred thirty".