1012123310221 has 8 divisors (see below), whose sum is σ = 1029817135520. Its totient is φ = 994505588208.

The previous prime is 1012123310203. The next prime is 1012123310227. The reversal of 1012123310221 is 1220133212101.

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 1012123310221 - 2²¹ = 1012121213069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012123310227) 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, 18998991 + ... + 19052188.

It is an arithmetic number, because the mean of its divisors is an integer number (128727141940).

Almost surely, 2^{1012123310221} is an apocalyptic number.

It is an amenable number.

1012123310221 is a deficient number, since it is larger than the sum of its proper divisors (17693825299).

1012123310221 is an equidigital number, since it uses as much as digits as its factorization.

1012123310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38051643.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1012123310221 its reverse (1220133212101), we get a palindrome (2232256522322).

The spelling of 1012123310221 in words is "one trillion, twelve billion, one hundred twenty-three million, three hundred ten thousand, two hundred twenty-one".