1311222122100 has 144 divisors (see below), whose sum is σ = 4598548799040. Its totient is φ = 317872022400.

The previous prime is 1311222122087. The next prime is 1311222122209. The reversal of 1311222122100 is 12212221131.

1311222122100 is a `hidden beast` number, since 1 + 311 + 222 + 122 + 10 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22044747 + ... + 22104146.

It is an arithmetic number, because the mean of its divisors is an integer number (31934366660).

Almost surely, 2^{1311222122100} is an apocalyptic number.

1311222122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311222122100 is an abundant number, since it is smaller than the sum of its proper divisors (3287326676940).

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

1311222122100 is a wasteful number, since it uses less digits than its factorization.

1311222122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44148927 (or 44148914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1311222122100 its reverse (12212221131), we get a palindrome (1323434343231).

The spelling of 1311222122100 in words is "one trillion, three hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred".