210000021111111 has 16 divisors (see below), whose sum is σ = 349090944185088. Its totient is φ = 109090920057600.

The previous prime is 210000021111079. The next prime is 210000021111131. The reversal of 210000021111111 is 111111120000012.

It is not a de Polignac number, because 210000021111111 - 2⁵ = 210000021111079 is a prime.

It is a super-3 number, since 3×210000021111111³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000021111131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454545500010 + ... + 454545500471.

It is an arithmetic number, because the mean of its divisors is an integer number (21818184011568).

Almost surely, 2^{210000021111111} is an apocalyptic number.

210000021111111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210000021111111 is a deficient number, since it is larger than the sum of its proper divisors (139090923073977).

210000021111111 is a wasteful number, since it uses less digits than its factorization.

210000021111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909091000502.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 210000021111111 its reverse (111111120000012), we get a palindrome (321111141111123).

The spelling of 210000021111111 in words is "two hundred ten trillion, twenty-one million, one hundred eleven thousand, one hundred eleven".