1212303420331 has 4 divisors (see below), whose sum is σ = 1229378116464. Its totient is φ = 1195228724200.

The previous prime is 1212303420311. The next prime is 1212303420347. The reversal of 1212303420331 is 1330243032121.

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 1212303420331 - 2⁵ = 1212303420299 is a prime.

It is a super-2 number, since 2×1212303420331² (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 = 1212303420296 and 1212303420305.

It is not an unprimeable number, because it can be changed into a prime (1212303420311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537347960 + ... + 8537348101.

It is an arithmetic number, because the mean of its divisors is an integer number (307344529116).

Almost surely, 2^{1212303420331} is an apocalyptic number.

1212303420331 is a deficient number, since it is larger than the sum of its proper divisors (17074696133).

1212303420331 is an equidigital number, since it uses as much as digits as its factorization.

1212303420331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17074696132.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1212303420331 its reverse (1330243032121), we get a palindrome (2542546452452).

The spelling of 1212303420331 in words is "one trillion, two hundred twelve billion, three hundred three million, four hundred twenty thousand, three hundred thirty-one".