1211011310111 has 8 divisors (see below), whose sum is σ = 1264266057600. Its totient is φ = 1157806736152.

The previous prime is 1211011310083. The next prime is 1211011310209. The reversal of 1211011310111 is 1110131101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211011310111 is a prime.

It is a super-2 number, since 2×1211011310111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011310711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12494045 + ... + 12590598.

It is an arithmetic number, because the mean of its divisors is an integer number (158033257200).

Almost surely, 2^{1211011310111} is an apocalyptic number.

1211011310111 is a deficient number, since it is larger than the sum of its proper divisors (53254747489).

1211011310111 is a wasteful number, since it uses less digits than its factorization.

1211011310111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25086765.

The product of its (nonzero) digits is 6, while the sum is 14.

Adding to 1211011310111 its reverse (1110131101121), we get a palindrome (2321142411232).

The spelling of 1211011310111 in words is "one trillion, two hundred eleven billion, eleven million, three hundred ten thousand, one hundred eleven".