1211202233131 has 24 divisors (see below), whose sum is σ = 1354109122800. Its totient is φ = 1082252160000.

The previous prime is 1211202233117. The next prime is 1211202233147. The reversal of 1211202233131 is 1313322021121.

It is not a de Polignac number, because 1211202233131 - 2¹⁵ = 1211202200363 is a prime.

It is a super-2 number, since 2×1211202233131² (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 (1211202233191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63734631 + ... + 63753631.

It is an arithmetic number, because the mean of its divisors is an integer number (56421213450).

Almost surely, 2^{1211202233131} is an apocalyptic number.

1211202233131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211202233131 is a deficient number, since it is larger than the sum of its proper divisors (142906889669).

1211202233131 is a wasteful number, since it uses less digits than its factorization.

1211202233131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28011 (or 28000 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1211202233131 its reverse (1313322021121), we get a palindrome (2524524254252).

The spelling of 1211202233131 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred thirty-three thousand, one hundred thirty-one".