21011210211110 has 48 divisors (see below), whose sum is σ = 46582836774624. Its totient is φ = 6780087998208.

The previous prime is 21011210211041. The next prime is 21011210211113. The reversal of 21011210211110 is 1111201211012.

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 (21011210211113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1261168754 + ... + 1261185413.

It is an arithmetic number, because the mean of its divisors is an integer number (970475766138).

Almost surely, 2^{21011210211110} is an apocalyptic number.

21011210211110 is an abundant number, since it is smaller than the sum of its proper divisors (25571626563514).

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

21011210211110 is a wasteful number, since it uses less digits than its factorization.

21011210211110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522354205 (or 2522354198 counting only the distinct ones).

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

Adding to 21011210211110 its reverse (1111201211012), we get a palindrome (22122411422122).

The spelling of 21011210211110 in words is "twenty-one trillion, eleven billion, two hundred ten million, two hundred eleven thousand, one hundred ten".