1321001031222 has 48 divisors (see below), whose sum is σ = 2864496697920. Its totient is φ = 439975727856.

The previous prime is 1321001031179. The next prime is 1321001031223. The reversal of 1321001031222 is 2221301001231.

1321001031222 is a `hidden beast` number, since 1 + 321 + 0 + 0 + 10 + 312 + 22 = 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 = 1321001031195 and 1321001031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321001031223) by changing a digit.

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, 157953613 + ... + 157961975.

It is an arithmetic number, because the mean of its divisors is an integer number (59677014540).

Almost surely, 2^{1321001031222} is an apocalyptic number.

1321001031222 is an abundant number, since it is smaller than the sum of its proper divisors (1543495666698).

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

1321001031222 is a wasteful number, since it uses less digits than its factorization.

1321001031222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14457 (or 14454 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1321001031222 its reverse (2221301001231), we get a palindrome (3542302032453).

The spelling of 1321001031222 in words is "one trillion, three hundred twenty-one billion, one million, thirty-one thousand, two hundred twenty-two".