1001221023 has 8 divisors (see below), whose sum is σ = 1456321536. Its totient is φ = 606800600.

The previous prime is 1001221021. The next prime is 1001221033. The reversal of 1001221023 is 3201221001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001221023 - 2¹ = 1001221021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15169983 + ... + 15170048.

It is an arithmetic number, because the mean of its divisors is an integer number (182040192).

Almost surely, 2^1001221023 is an apocalyptic number.

1001221023 is a deficient number, since it is larger than the sum of its proper divisors (455100513).

1001221023 is a wasteful number, since it uses less digits than its factorization.

1001221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30340045.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1001221023 is about 31642.0767807677. The cubic root of 1001221023 is about 1000.4068421237.

Adding to 1001221023 its reverse (3201221001), we get a palindrome (4202442024).

The spelling of 1001221023 in words is "one billion, one million, two hundred twenty-one thousand, twenty-three".