211010112121111 has 4 divisors (see below), whose sum is σ = 211684265834272. Its totient is φ = 210335958407952.

The previous prime is 211010112121097. The next prime is 211010112121121. The reversal of 211010112121111 is 111121211010112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211010112121111 - 2⁵ = 211010112121079 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 (211010112121121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337076856111 + ... + 337076856736.

It is an arithmetic number, because the mean of its divisors is an integer number (52921066458568).

Almost surely, 2^{211010112121111} is an apocalyptic number.

211010112121111 is a deficient number, since it is larger than the sum of its proper divisors (674153713161).

211010112121111 is an equidigital number, since it uses as much as digits as its factorization.

211010112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674153713160.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211010112121111 its reverse (111121211010112), we get a palindrome (322131323131223).

The spelling of 211010112121111 in words is "two hundred eleven trillion, ten billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".