1201221000323 has 4 divisors (see below), whose sum is σ = 1212447364920. Its totient is φ = 1189994635728.

The previous prime is 1201221000313. The next prime is 1201221000383. The reversal of 1201221000323 is 3230001221021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201221000323 - 2¹⁰ = 1201220999299 is a prime.

It is a super-2 number, since 2×1201221000323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221000313) 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, 5613182138 + ... + 5613182351.

It is an arithmetic number, because the mean of its divisors is an integer number (303111841230).

Almost surely, 2^{1201221000323} is an apocalyptic number.

1201221000323 is a deficient number, since it is larger than the sum of its proper divisors (11226364597).

1201221000323 is a wasteful number, since it uses less digits than its factorization.

1201221000323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11226364596.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1201221000323 its reverse (3230001221021), we get a palindrome (4431222221344).

The spelling of 1201221000323 in words is "one trillion, two hundred one billion, two hundred twenty-one million, three hundred twenty-three", and thus it is an aban number.