1211030223011 has 16 divisors (see below), whose sum is σ = 1448348160000. Its totient is φ = 990049328928.

The previous prime is 1211030223001. The next prime is 1211030223017. The reversal of 1211030223011 is 1103220301121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211030223011 is a prime.

It is a super-3 number, since 3×1211030223011³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1211030223017) 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, 10720211 + ... + 10832588.

It is an arithmetic number, because the mean of its divisors is an integer number (90521760000).

Almost surely, 2^{1211030223011} is an apocalyptic number.

1211030223011 is a deficient number, since it is larger than the sum of its proper divisors (237317936989).

1211030223011 is a wasteful number, since it uses less digits than its factorization.

1211030223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21553178.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1211030223011 its reverse (1103220301121), we get a palindrome (2314250524132).

The spelling of 1211030223011 in words is "one trillion, two hundred eleven billion, thirty million, two hundred twenty-three thousand, eleven".