1211223012331 has 8 divisors (see below), whose sum is σ = 1242370198944. Its totient is φ = 1180152262080.

The previous prime is 1211223012257. The next prime is 1211223012361. The reversal of 1211223012331 is 1332103221121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211223012331 - 2³⁹ = 661467198443 is a prime.

It is a super-2 number, since 2×1211223012331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211223012361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19076991 + ... + 19140376.

It is an arithmetic number, because the mean of its divisors is an integer number (155296274868).

Almost surely, 2^{1211223012331} is an apocalyptic number.

1211223012331 is a deficient number, since it is larger than the sum of its proper divisors (31147186613).

1211223012331 is an equidigital number, since it uses as much as digits as its factorization.

1211223012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38218181.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1211223012331 its reverse (1332103221121), we get a palindrome (2543326233452).

The spelling of 1211223012331 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, twelve thousand, three hundred thirty-one".