1212202331231 has 4 divisors (see below), whose sum is σ = 1212217938600. Its totient is φ = 1212186723864.

The previous prime is 1212202331203. The next prime is 1212202331239. The reversal of 1212202331231 is 1321332022121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212202331231 - 2¹⁴ = 1212202314847 is a prime.

It is a super-2 number, since 2×1212202331231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212202331197 and 1212202331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212202331239) 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 3 ways as a sum of consecutive naturals, for example, 7686596 + ... + 7842713.

It is an arithmetic number, because the mean of its divisors is an integer number (303054484650).

Almost surely, 2^{1212202331231} is an apocalyptic number.

1212202331231 is a deficient number, since it is larger than the sum of its proper divisors (15607369).

1212202331231 is an equidigital number, since it uses as much as digits as its factorization.

1212202331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15607368.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1212202331231 its reverse (1321332022121), we get a palindrome (2533534353352).

The spelling of 1212202331231 in words is "one trillion, two hundred twelve billion, two hundred two million, three hundred thirty-one thousand, two hundred thirty-one".