1221023021113 has 8 divisors (see below), whose sum is σ = 1395702040832. Its totient is φ = 1046405791296.

The previous prime is 1221023021107. The next prime is 1221023021201. The reversal of 1221023021113 is 3111203201221.

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 1221023021113 - 2⁹ = 1221023020601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221023021513) 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, 15405120 + ... + 15484177.

It is an arithmetic number, because the mean of its divisors is an integer number (174462755104).

Almost surely, 2^{1221023021113} is an apocalyptic number.

It is an amenable number.

1221023021113 is a deficient number, since it is larger than the sum of its proper divisors (174679019719).

1221023021113 is an equidigital number, since it uses as much as digits as its factorization.

1221023021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30894951.

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

Adding to 1221023021113 its reverse (3111203201221), we get a palindrome (4332226222334).

The spelling of 1221023021113 in words is "one trillion, two hundred twenty-one billion, twenty-three million, twenty-one thousand, one hundred thirteen".