1101221012321 has 4 divisors (see below), whose sum is σ = 1128080061444. Its totient is φ = 1074361963200.

The previous prime is 1101221012273. The next prime is 1101221012329. The reversal of 1101221012321 is 1232101221011.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 627959568721 + 473261443600 = 792439^2 + 687940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221012321 - 2¹⁸ = 1101220750177 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 1101221012321.

It is not an unprimeable number, because it can be changed into a prime (1101221012329) 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, 13429524500 + ... + 13429524581.

It is an arithmetic number, because the mean of its divisors is an integer number (282020015361).

Almost surely, 2^{1101221012321} is an apocalyptic number.

It is an amenable number.

1101221012321 is a deficient number, since it is larger than the sum of its proper divisors (26859049123).

1101221012321 is an equidigital number, since it uses as much as digits as its factorization.

1101221012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26859049122.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1101221012321 its reverse (1232101221011), we get a palindrome (2333322233332).

The spelling of 1101221012321 in words is "one trillion, one hundred one billion, two hundred twenty-one million, twelve thousand, three hundred twenty-one".