21103311213120 has 56 divisors (see below), whose sum is σ = 67003013104704. Its totient is φ = 5627549656576.

The previous prime is 21103311213109. The next prime is 21103311213139. The reversal of 21103311213120 is 2131211330112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10991306964 + ... + 10991308883.

Almost surely, 2^{21103311213120} is an apocalyptic number.

21103311213120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103311213120 is an abundant number, since it is smaller than the sum of its proper divisors (45899701891584).

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

21103311213120 is a wasteful number, since it uses less digits than its factorization.

21103311213120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982615867 (or 21982615857 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21103311213120 its reverse (2131211330112), we get a palindrome (23234522543232).

The spelling of 21103311213120 in words is "twenty-one trillion, one hundred three billion, three hundred eleven million, two hundred thirteen thousand, one hundred twenty".