21000122011110 has 64 divisors (see below), whose sum is σ = 55526515317504. Its totient is φ = 5040533328000.

The previous prime is 21000122011109. The next prime is 21000122011133. The reversal of 21000122011110 is 1111022100012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315000004 + ... + 315066663.

It is an arithmetic number, because the mean of its divisors is an integer number (867601801836).

Almost surely, 2^{21000122011110} is an apocalyptic number.

21000122011110 is an abundant number, since it is smaller than the sum of its proper divisors (34526393306394).

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

21000122011110 is a wasteful number, since it uses less digits than its factorization.

21000122011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630066789.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21000122011110 its reverse (1111022100012), we get a palindrome (22111144111122).

It can be divided in two parts, 210001 and 22011110, that added together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 21000122011110 in words is "twenty-one trillion, one hundred twenty-two million, eleven thousand, one hundred ten".