210011210021111 has 4 divisors (see below), whose sum is σ = 210032017641432. Its totient is φ = 209990402400792.

The previous prime is 210011210021057. The next prime is 210011210021131. The reversal of 210011210021111 is 111120012110012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210011210021111 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 (210011210021131) 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, 10403795021 + ... + 10403815206.

It is an arithmetic number, because the mean of its divisors is an integer number (52508004410358).

Almost surely, 2^{210011210021111} is an apocalyptic number.

210011210021111 is a deficient number, since it is larger than the sum of its proper divisors (20807620321).

210011210021111 is a wasteful number, since it uses less digits than its factorization.

210011210021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807620320.

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

Adding to 210011210021111 its reverse (111120012110012), we get a palindrome (321131222131123).

The spelling of 210011210021111 in words is "two hundred ten trillion, eleven billion, two hundred ten million, twenty-one thousand, one hundred eleven".