1211031103111 has 8 divisors (see below), whose sum is σ = 1217623567104. Its totient is φ = 1204446686520.

The previous prime is 1211031103103. The next prime is 1211031103169. The reversal of 1211031103111 is 1113011301121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211031103111 - 2³ = 1211031103103 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 (1211031103211) 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, 1709935 + ... + 2312128.

It is an arithmetic number, because the mean of its divisors is an integer number (152202945888).

Almost surely, 2^{1211031103111} is an apocalyptic number.

1211031103111 is a deficient number, since it is larger than the sum of its proper divisors (6592463993).

1211031103111 is a wasteful number, since it uses less digits than its factorization.

1211031103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023701.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1211031103111 its reverse (1113011301121), we get a palindrome (2324042404232).

The spelling of 1211031103111 in words is "one trillion, two hundred eleven billion, thirty-one million, one hundred three thousand, one hundred eleven".