1021220321223 has 4 divisors (see below), whose sum is σ = 1361627094968. Its totient is φ = 680813547480.

The previous prime is 1021220321203. The next prime is 1021220321243. The reversal of 1021220321223 is 3221230221201.

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

It is an interprime number because it is at equal distance from previous prime (1021220321203) and next prime (1021220321243).

It is not a de Polignac number, because 1021220321223 - 2³⁰ = 1020146579399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021220321223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220321203) 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, 170203386868 + ... + 170203386873.

It is an arithmetic number, because the mean of its divisors is an integer number (340406773742).

Almost surely, 2^{1021220321223} is an apocalyptic number.

1021220321223 is a deficient number, since it is larger than the sum of its proper divisors (340406773745).

1021220321223 is an equidigital number, since it uses as much as digits as its factorization.

1021220321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340406773744.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1021220321223 its reverse (3221230221201), we get a palindrome (4242450542424).

The spelling of 1021220321223 in words is "one trillion, twenty-one billion, two hundred twenty million, three hundred twenty-one thousand, two hundred twenty-three".