1212000011331 has 32 divisors (see below), whose sum is σ = 1732657819200. Its totient is φ = 752089121280.

The previous prime is 1212000011221. The next prime is 1212000011333. The reversal of 1212000011331 is 1331100002121.

It is a happy number.

It is not a de Polignac number, because 1212000011331 - 2¹⁹ = 1211999487043 is a prime.

It is a super-3 number, since 3×1212000011331³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1212000011331.

It is not an unprimeable number, because it can be changed into a prime (1212000011333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1376260 + ... + 2078001.

It is an arithmetic number, because the mean of its divisors is an integer number (54145556850).

Almost surely, 2^{1212000011331} is an apocalyptic number.

1212000011331 is a deficient number, since it is larger than the sum of its proper divisors (520657807869).

1212000011331 is a wasteful number, since it uses less digits than its factorization.

1212000011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454439.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1212000011331 its reverse (1331100002121), we get a palindrome (2543100013452).

The spelling of 1212000011331 in words is "one trillion, two hundred twelve billion, eleven thousand, three hundred thirty-one".