1221134235 has 8 divisors (see below), whose sum is σ = 1953814800. Its totient is φ = 651271584.

The previous prime is 1221134221. The next prime is 1221134251. The reversal of 1221134235 is 5324311221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221134235 - 2⁶ = 1221134171 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40704460 + ... + 40704489.

It is an arithmetic number, because the mean of its divisors is an integer number (244226850).

Almost surely, 2^1221134235 is an apocalyptic number.

1221134235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1221134235 is a deficient number, since it is larger than the sum of its proper divisors (732680565).

1221134235 is an equidigital number, since it uses as much as digits as its factorization.

1221134235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81408957.

The product of its digits is 1440, while the sum is 24.

The square root of 1221134235 is about 34944.7311479141. The cubic root of 1221134235 is about 1068.8607652375.

Adding to 1221134235 its reverse (5324311221), we get a palindrome (6545445456).

The spelling of 1221134235 in words is "one billion, two hundred twenty-one million, one hundred thirty-four thousand, two hundred thirty-five".