1212131235 has 32 divisors (see below), whose sum is σ = 2218816512. Its totient is φ = 553530240.

The previous prime is 1212131233. The next prime is 1212131287. The reversal of 1212131235 is 5321312121.

It is not a de Polignac number, because 1212131235 - 2¹ = 1212131233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1212131233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102657 + ... + 113853.

It is an arithmetic number, because the mean of its divisors is an integer number (69338016).

Almost surely, 2^1212131235 is an apocalyptic number.

1212131235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1212131235 is a deficient number, since it is larger than the sum of its proper divisors (1006685277).

1212131235 is a wasteful number, since it uses less digits than its factorization.

1212131235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243.

The product of its digits is 360, while the sum is 21.

The square root of 1212131235 is about 34815.6751334797. The cubic root of 1212131235 is about 1066.2275030792.

Adding to 1212131235 its reverse (5321312121), we get a palindrome (6533443356).

The spelling of 1212131235 in words is "one billion, two hundred twelve million, one hundred thirty-one thousand, two hundred thirty-five".