1201321223213 has 16 divisors (see below), whose sum is σ = 1296562692096. Its totient is φ = 1109811339120.

The previous prime is 1201321223203. The next prime is 1201321223239. The reversal of 1201321223213 is 3123221231021.

It is a cyclic number.

It is not a de Polignac number, because 1201321223213 - 2⁴ = 1201321223197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201321223203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1316195 + ... + 2033472.

It is an arithmetic number, because the mean of its divisors is an integer number (81035168256).

Almost surely, 2^{1201321223213} is an apocalyptic number.

It is an amenable number.

1201321223213 is a deficient number, since it is larger than the sum of its proper divisors (95241468883).

1201321223213 is a wasteful number, since it uses less digits than its factorization.

1201321223213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350224.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1201321223213 its reverse (3123221231021), we get a palindrome (4324542454234).

The spelling of 1201321223213 in words is "one trillion, two hundred one billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred thirteen".