210011121111111 has 8 divisors (see below), whose sum is σ = 283958698967424. Its totient is φ = 138035478664440.

The previous prime is 210011121111107. The next prime is 210011121111119. The reversal of 210011121111111 is 111111121110012.

It is a happy number.

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

It is not a de Polignac number, because 210011121111111 - 2² = 210011121111107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011121111119) 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, 492983852161 + ... + 492983852586.

It is an arithmetic number, because the mean of its divisors is an integer number (35494837370928).

Almost surely, 2^{210011121111111} is an apocalyptic number.

210011121111111 is a deficient number, since it is larger than the sum of its proper divisors (73947577856313).

210011121111111 is an equidigital number, since it uses as much as digits as its factorization.

210011121111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985967704821.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 210011121111111 its reverse (111111121110012), we get a palindrome (321122242221123).

The spelling of 210011121111111 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred eleven".