1231311221102 has 8 divisors (see below), whose sum is σ = 1846973984112. Its totient is φ = 615653226400.

The previous prime is 1231311221053. The next prime is 1231311221113. The reversal of 1231311221102 is 2011221131321.

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

It is a super-2 number, since 2×1231311221102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455474 + ... + 1634037.

It is an arithmetic number, because the mean of its divisors is an integer number (230871748014).

Almost surely, 2^{1231311221102} is an apocalyptic number.

1231311221102 is a deficient number, since it is larger than the sum of its proper divisors (615662763010).

1231311221102 is a wasteful number, since it uses less digits than its factorization.

1231311221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384154.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1231311221102 its reverse (2011221131321), we get a palindrome (3242532352423).

The spelling of 1231311221102 in words is "one trillion, two hundred thirty-one billion, three hundred eleven million, two hundred twenty-one thousand, one hundred two".