21612403021110 has 128 divisors (see below), whose sum is σ = 61081476572160. Its totient is φ = 4838758848000.

The previous prime is 21612403021109. The next prime is 21612403021117. The reversal of 21612403021110 is 1112030421612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612403021117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48874441 + ... + 49314660.

It is an arithmetic number, because the mean of its divisors is an integer number (477199035720).

Almost surely, 2^{21612403021110} is an apocalyptic number.

21612403021110 is an abundant number, since it is smaller than the sum of its proper divisors (39469073551050).

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

21612403021110 is a wasteful number, since it uses less digits than its factorization.

21612403021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98189174.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21612403021110 its reverse (1112030421612), we get a palindrome (22724433442722).

The spelling of 21612403021110 in words is "twenty-one trillion, six hundred twelve billion, four hundred three million, twenty-one thousand, one hundred ten".