1001021022223 has 4 divisors (see below), whose sum is σ = 1002353940448. Its totient is φ = 999688104000.

The previous prime is 1001021022167. The next prime is 1001021022233. The reversal of 1001021022223 is 3222201201001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001021022223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001021022197 and 1001021022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001021022233) 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, 666457986 + ... + 666459487.

It is an arithmetic number, because the mean of its divisors is an integer number (250588485112).

Almost surely, 2^{1001021022223} is an apocalyptic number.

1001021022223 is a deficient number, since it is larger than the sum of its proper divisors (1332918225).

1001021022223 is an equidigital number, since it uses as much as digits as its factorization.

1001021022223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332918224.

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

Adding to 1001021022223 its reverse (3222201201001), we get a palindrome (4223222223224).

The spelling of 1001021022223 in words is "one trillion, one billion, twenty-one million, twenty-two thousand, two hundred twenty-three".