1213051215 has 16 divisors (see below), whose sum is σ = 1988221536. Its totient is φ = 631180800.

The previous prime is 1213051207. The next prime is 1213051283. The reversal of 1213051215 is 5121503121.

It is not a de Polignac number, because 1213051215 - 2³ = 1213051207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213051191 and 1213051200.

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, 985606 + ... + 986835.

It is an arithmetic number, because the mean of its divisors is an integer number (124263846).

Almost surely, 2^1213051215 is an apocalyptic number.

1213051215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213051215 is a deficient number, since it is larger than the sum of its proper divisors (775170321).

1213051215 is a wasteful number, since it uses less digits than its factorization.

1213051215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972490.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1213051215 is about 34828.8847797342. The cubic root of 1213051215 is about 1066.4971823274.

Adding to 1213051215 its reverse (5121503121), we get a palindrome (6334554336).

The spelling of 1213051215 in words is "one billion, two hundred thirteen million, fifty-one thousand, two hundred fifteen".