21311313030100 has 36 divisors (see below), whose sum is σ = 46245897690300. Its totient is φ = 8524460988160.

The previous prime is 21311313030079. The next prime is 21311313030113. The reversal of 21311313030100 is 103031311312.

It can be written as a sum of positive squares in 6 ways, for example, as 5468731915024 + 15842581115076 = 2338532^2 + 3980274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13871106 + ... + 15330694.

It is an arithmetic number, because the mean of its divisors is an integer number (1284608269175).

Almost surely, 2^{21311313030100} is an apocalyptic number.

21311313030100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311313030100 is an abundant number, since it is smaller than the sum of its proper divisors (24934584660200).

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

21311313030100 is a wasteful number, since it uses less digits than its factorization.

21311313030100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605612 (or 1605605 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21311313030100 its reverse (103031311312), we get a palindrome (21414344341412).

The spelling of 21311313030100 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirteen million, thirty thousand, one hundred".