1311223213100 has 18 divisors (see below), whose sum is σ = 2845354372644. Its totient is φ = 524489285200.

The previous prime is 1311223213087. The next prime is 1311223213117. The reversal of 1311223213100 is 13123221131.

It is a happy number.

It is a super-2 number, since 2×1311223213100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6556115966 + ... + 6556116165.

Almost surely, 2^{1311223213100} is an apocalyptic number.

1311223213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311223213100 is an abundant number, since it is smaller than the sum of its proper divisors (1534131159544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311223213100 is a wasteful number, since it uses less digits than its factorization.

1311223213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13112232145 (or 13112232138 counting only the distinct ones).

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

Adding to 1311223213100 its reverse (13123221131), we get a palindrome (1324346434231).

The spelling of 1311223213100 in words is "one trillion, three hundred eleven billion, two hundred twenty-three million, two hundred thirteen thousand, one hundred".