211011101011091 has 32 divisors (see below), whose sum is σ = 220518770395392. Its totient is φ = 201759492879360.

The previous prime is 211011101011069. The next prime is 211011101011199. The reversal of 211011101011091 is 190110101110112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211011101011091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211011101013091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114850135 + ... + 1115039391.

It is an arithmetic number, because the mean of its divisors is an integer number (6891211574856).

Almost surely, 2^{211011101011091} is an apocalyptic number.

211011101011091 is a deficient number, since it is larger than the sum of its proper divisors (9507669384301).

211011101011091 is a wasteful number, since it uses less digits than its factorization.

211011101011091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191999.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 211011101011091 in words is "two hundred eleven trillion, eleven billion, one hundred one million, eleven thousand, ninety-one".