1213111100322 has 48 divisors (see below), whose sum is σ = 2934036170208. Its totient is φ = 359060365440.

The previous prime is 1213111100239. The next prime is 1213111100351. The reversal of 1213111100322 is 2230011113121.

1213111100322 is a `hidden beast` number, since 1 + 21 + 311 + 1 + 10 + 0 + 322 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1213111100295 and 1213111100304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71233623 + ... + 71250650.

It is an arithmetic number, because the mean of its divisors is an integer number (61125753546).

Almost surely, 2^{1213111100322} is an apocalyptic number.

1213111100322 is an abundant number, since it is smaller than the sum of its proper divisors (1720925069886).

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

1213111100322 is a wasteful number, since it uses less digits than its factorization.

1213111100322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142484335 (or 142484332 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1213111100322 its reverse (2230011113121), we get a palindrome (3443122213443).

The spelling of 1213111100322 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, one hundred thousand, three hundred twenty-two".