1200211331331 has 4 divisors (see below), whose sum is σ = 1600281775112. Its totient is φ = 800140887552.

The previous prime is 1200211331317. The next prime is 1200211331351. The reversal of 1200211331331 is 1331331120021.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1200211331331 is a prime.

It is a super-2 number, since 2×1200211331331² (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 = 1200211331298 and 1200211331307.

It is not an unprimeable number, because it can be changed into a prime (1200211331351) 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, 200035221886 + ... + 200035221891.

It is an arithmetic number, because the mean of its divisors is an integer number (400070443778).

Almost surely, 2^{1200211331331} is an apocalyptic number.

1200211331331 is a deficient number, since it is larger than the sum of its proper divisors (400070443781).

1200211331331 is an equidigital number, since it uses as much as digits as its factorization.

1200211331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400070443780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1200211331331 its reverse (1331331120021), we get a palindrome (2531542451352).

The spelling of 1200211331331 in words is "one trillion, two hundred billion, two hundred eleven million, three hundred thirty-one thousand, three hundred thirty-one".