1221002320422 has 8 divisors (see below), whose sum is σ = 2442004640856. Its totient is φ = 407000773472.

The previous prime is 1221002320409. The next prime is 1221002320423. The reversal of 1221002320422 is 2240232001221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221002320422 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221002320423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101750193363 + ... + 101750193374.

It is an arithmetic number, because the mean of its divisors is an integer number (305250580107).

Almost surely, 2^{1221002320422} is an apocalyptic number.

1221002320422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221002320422 is a wasteful number, since it uses less digits than its factorization.

1221002320422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203500386742.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1221002320422 its reverse (2240232001221), we get a palindrome (3461234321643).

The spelling of 1221002320422 in words is "one trillion, two hundred twenty-one billion, two million, three hundred twenty thousand, four hundred twenty-two".