1211201231133 has 16 divisors (see below), whose sum is σ = 1677217631040. Its totient is φ = 776816574336.

The previous prime is 1211201231089. The next prime is 1211201231173. The reversal of 1211201231133 is 3311321021121.

It is not a de Polignac number, because 1211201231133 - 2⁶ = 1211201231069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201231173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61291935 + ... + 61311692.

It is an arithmetic number, because the mean of its divisors is an integer number (104826101940).

Almost surely, 2^{1211201231133} is an apocalyptic number.

It is an amenable number.

1211201231133 is a deficient number, since it is larger than the sum of its proper divisors (466016399907).

1211201231133 is a wasteful number, since it uses less digits than its factorization.

1211201231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122603756.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1211201231133 its reverse (3311321021121), we get a palindrome (4522522252254).

The spelling of 1211201231133 in words is "one trillion, two hundred eleven billion, two hundred one million, two hundred thirty-one thousand, one hundred thirty-three".