1211130233311 has 4 divisors (see below), whose sum is σ = 1211259209824. Its totient is φ = 1211001256800.

The previous prime is 1211130233309. The next prime is 1211130233353. The reversal of 1211130233311 is 1133320311121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211130233311 - 2¹ = 1211130233309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211130233381) 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, 64474170 + ... + 64492951.

It is an arithmetic number, because the mean of its divisors is an integer number (302814802456).

Almost surely, 2^{1211130233311} is an apocalyptic number.

1211130233311 is a deficient number, since it is larger than the sum of its proper divisors (128976513).

1211130233311 is an equidigital number, since it uses as much as digits as its factorization.

1211130233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128976512.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1211130233311 its reverse (1133320311121), we get a palindrome (2344450544432).

It can be divided in two parts, 1211130 and 233311, that added together give a palindrome (1444441).

The spelling of 1211130233311 in words is "one trillion, two hundred eleven billion, one hundred thirty million, two hundred thirty-three thousand, three hundred eleven".