1212281085 has 8 divisors (see below), whose sum is σ = 1939649760. Its totient is φ = 646549904.

The previous prime is 1212281053. The next prime is 1212281093. The reversal of 1212281085 is 5801822121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212281085 - 2⁵ = 1212281053 is a prime.

It is a Curzon number.

It is a congruent number.

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, 40409355 + ... + 40409384.

It is an arithmetic number, because the mean of its divisors is an integer number (242456220).

Almost surely, 2^1212281085 is an apocalyptic number.

1212281085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212281085 is a deficient number, since it is larger than the sum of its proper divisors (727368675).

1212281085 is an equidigital number, since it uses as much as digits as its factorization.

1212281085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80818747.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 1212281085 is about 34817.8271148560. The cubic root of 1212281085 is about 1066.2714388080.

The spelling of 1212281085 in words is "one billion, two hundred twelve million, two hundred eighty-one thousand, eighty-five".