1211011112211 has 8 divisors (see below), whose sum is σ = 1615312968144. Its totient is φ = 807024998880.

The previous prime is 1211011112137. The next prime is 1211011112237. The reversal of 1211011112211 is 1122111101121.

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

It is not a de Polignac number, because 1211011112211 - 2¹⁸ = 1211010850067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211011112281) 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, 78926700 + ... + 78942041.

It is an arithmetic number, because the mean of its divisors is an integer number (201914121018).

Almost surely, 2^{1211011112211} is an apocalyptic number.

1211011112211 is a deficient number, since it is larger than the sum of its proper divisors (404301855933).

1211011112211 is a wasteful number, since it uses less digits than its factorization.

1211011112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157871301.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1211011112211 its reverse (1122111101121), we get a palindrome (2333122213332).

The spelling of 1211011112211 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twelve thousand, two hundred eleven".