1312100220222 has 48 divisors (see below), whose sum is σ = 3102003710208. Its totient is φ = 397519471440.

The previous prime is 1312100220209. The next prime is 1312100220227. The reversal of 1312100220222 is 2220220012131.

1312100220222 is a `hidden beast` number, since 13 + 1 + 210 + 0 + 220 + 222 = 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 = 1312100220195 and 1312100220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312100220227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191563 + ... + 1631225.

It is an arithmetic number, because the mean of its divisors is an integer number (64625077296).

Almost surely, 2^{1312100220222} is an apocalyptic number.

1312100220222 is an abundant number, since it is smaller than the sum of its proper divisors (1789903489986).

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

1312100220222 is a wasteful number, since it uses less digits than its factorization.

1312100220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444285 (or 1444282 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1312100220222 its reverse (2220220012131), we get a palindrome (3532320232353).

The spelling of 1312100220222 in words is "one trillion, three hundred twelve billion, one hundred million, two hundred twenty thousand, two hundred twenty-two".