1201322021331 has 4 divisors (see below), whose sum is σ = 1601762695112. Its totient is φ = 800881347552.

The previous prime is 1201322021327. The next prime is 1201322021351. The reversal of 1201322021331 is 1331202231021.

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

It is not a de Polignac number, because 1201322021331 - 2² = 1201322021327 is a prime.

It is a super-2 number, since 2×1201322021331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201322021298 and 1201322021307.

It is not an unprimeable number, because it can be changed into a prime (1201322021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200220336886 + ... + 200220336891.

It is an arithmetic number, because the mean of its divisors is an integer number (400440673778).

Almost surely, 2^{1201322021331} is an apocalyptic number.

1201322021331 is a deficient number, since it is larger than the sum of its proper divisors (400440673781).

1201322021331 is an equidigital number, since it uses as much as digits as its factorization.

1201322021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400440673780.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1201322021331 its reverse (1331202231021), we get a palindrome (2532524252352).

The spelling of 1201322021331 in words is "one trillion, two hundred one billion, three hundred twenty-two million, twenty-one thousand, three hundred thirty-one".