1000021221223 has 16 divisors (see below), whose sum is σ = 1111706592480. Its totient is φ = 895178059776.

The previous prime is 1000021221197. The next prime is 1000021221289. The reversal of 1000021221223 is 3221221200001.

It is a happy number.

It is not a de Polignac number, because 1000021221223 - 2⁵ = 1000021221191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000021221197 and 1000021221206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021221523) 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, 15104586 + ... + 15170647.

It is an arithmetic number, because the mean of its divisors is an integer number (69481662030).

Almost surely, 2^{1000021221223} is an apocalyptic number.

1000021221223 is a deficient number, since it is larger than the sum of its proper divisors (111685371257).

1000021221223 is a wasteful number, since it uses less digits than its factorization.

1000021221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30275346.

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

Adding to 1000021221223 its reverse (3221221200001), we get a palindrome (4221242421224).

The spelling of 1000021221223 in words is "one trillion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-three".