1231122003311 has 4 divisors (see below), whose sum is σ = 1232068293624. Its totient is φ = 1230175713000.

The previous prime is 1231122003301. The next prime is 1231122003313. The reversal of 1231122003311 is 1133002211321.

It is a happy number.

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 1231122003311 - 2²² = 1231117809007 is a prime.

It is a super-2 number, since 2×1231122003311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231122003313) 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, 473143205 + ... + 473145806.

It is an arithmetic number, because the mean of its divisors is an integer number (308017073406).

Almost surely, 2^{1231122003311} is an apocalyptic number.

1231122003311 is a deficient number, since it is larger than the sum of its proper divisors (946290313).

1231122003311 is an equidigital number, since it uses as much as digits as its factorization.

1231122003311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946290312.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231122003311 its reverse (1133002211321), we get a palindrome (2364124214632).

The spelling of 1231122003311 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, three thousand, three hundred eleven".