1211112020111 has 24 divisors (see below), whose sum is σ = 1454394299904. Its totient is φ = 1004537827440.

The previous prime is 1211112020087. The next prime is 1211112020117. The reversal of 1211112020111 is 1110202111121.

It is not a de Polignac number, because 1211112020111 - 2¹⁴ = 1211112003727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211112020117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41063576 + ... + 41093058.

It is an arithmetic number, because the mean of its divisors is an integer number (60599762496).

Almost surely, 2^{1211112020111} is an apocalyptic number.

1211112020111 is a deficient number, since it is larger than the sum of its proper divisors (243282279793).

1211112020111 is a wasteful number, since it uses less digits than its factorization.

1211112020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56571 (or 56564 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211112020111 its reverse (1110202111121), we get a palindrome (2321314131232).

The spelling of 1211112020111 in words is "one trillion, two hundred eleven billion, one hundred twelve million, twenty thousand, one hundred eleven".