1213212122331 has 8 divisors (see below), whose sum is σ = 1764672177984. Its totient is φ = 735280074120.

The previous prime is 1213212122263. The next prime is 1213212122341. The reversal of 1213212122331 is 1332212123121.

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

It is not a de Polignac number, because 1213212122331 - 2¹⁰ = 1213212121307 is a prime.

It is a super-2 number, since 2×1213212122331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213212122341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18382001821 + ... + 18382001886.

It is an arithmetic number, because the mean of its divisors is an integer number (220584022248).

Almost surely, 2^{1213212122331} is an apocalyptic number.

1213212122331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213212122331 is a deficient number, since it is larger than the sum of its proper divisors (551460055653).

1213212122331 is a wasteful number, since it uses less digits than its factorization.

1213212122331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36764003721.

The product of its digits is 864, while the sum is 24.

Adding to 1213212122331 its reverse (1332212123121), we get a palindrome (2545424245452).

The spelling of 1213212122331 in words is "one trillion, two hundred thirteen billion, two hundred twelve million, one hundred twenty-two thousand, three hundred thirty-one".