1001320222021 has 16 divisors (see below), whose sum is σ = 1197447321600. Its totient is φ = 818671355568.

The previous prime is 1001320221973. The next prime is 1001320222031. The reversal of 1001320222021 is 1202220231001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1001320222021 - 2¹¹ = 1001320219973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001320221986 and 1001320222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001320222031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8604291 + ... + 8719888.

It is an arithmetic number, because the mean of its divisors is an integer number (74840457600).

Almost surely, 2^{1001320222021} is an apocalyptic number.

It is an amenable number.

1001320222021 is a deficient number, since it is larger than the sum of its proper divisors (196127099579).

1001320222021 is a wasteful number, since it uses less digits than its factorization.

1001320222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17324568.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1001320222021 its reverse (1202220231001), we get a palindrome (2203540453022).

The spelling of 1001320222021 in words is "one trillion, one billion, three hundred twenty million, two hundred twenty-two thousand, twenty-one".