1211033312331 has 16 divisors (see below), whose sum is σ = 1665233088288. Its totient is φ = 782275622400.

The previous prime is 1211033312323. The next prime is 1211033312369. The reversal of 1211033312331 is 1332133301121.

It is not a de Polignac number, because 1211033312331 - 2³ = 1211033312323 is a prime.

It is a super-2 number, since 2×1211033312331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211033312431) 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, 22608540 + ... + 22662041.

It is an arithmetic number, because the mean of its divisors is an integer number (104077068018).

Almost surely, 2^{1211033312331} is an apocalyptic number.

1211033312331 is a deficient number, since it is larger than the sum of its proper divisors (454199775957).

1211033312331 is a wasteful number, since it uses less digits than its factorization.

1211033312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45270862.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1211033312331 its reverse (1332133301121), we get a palindrome (2543166613452).

The spelling of 1211033312331 in words is "one trillion, two hundred eleven billion, thirty-three million, three hundred twelve thousand, three hundred thirty-one".