21013040140100 has 36 divisors (see below), whose sum is σ = 45658532799684. Its totient is φ = 8394112702080.

The previous prime is 21013040140097. The next prime is 21013040140123. The reversal of 21013040140100 is 104104031012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 130827844 + 21012909312256 = 11438^2 + 4583984^2 .

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, 138715847 + ... + 138867246.

It is an arithmetic number, because the mean of its divisors is an integer number (1268292577769).

Almost surely, 2^{21013040140100} is an apocalyptic number.

21013040140100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013040140100 is an abundant number, since it is smaller than the sum of its proper divisors (24645492659584).

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

21013040140100 is a wasteful number, since it uses less digits than its factorization.

21013040140100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277583864 (or 277583857 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21013040140100 its reverse (104104031012), we get a palindrome (21117144171112).

The spelling of 21013040140100 in words is "twenty-one trillion, thirteen billion, forty million, one hundred forty thousand, one hundred".