211311021110 has 32 divisors (see below), whose sum is σ = 457575747840. Its totient is φ = 68636361312.

The previous prime is 211311021109. The next prime is 211311021113. The reversal of 211311021110 is 11120113112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211311021113) 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, 79438904 + ... + 79441563.

It is an arithmetic number, because the mean of its divisors is an integer number (14299242120).

Almost surely, 2^211311021110 is an apocalyptic number.

211311021110 is an abundant number, since it is smaller than the sum of its proper divisors (246264726730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211311021110 is a wasteful number, since it uses less digits than its factorization.

211311021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158880500.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 211311021110 its reverse (11120113112), we get a palindrome (222431134222).

The spelling of 211311021110 in words is "two hundred eleven billion, three hundred eleven million, twenty-one thousand, one hundred ten".