21100313122 has 32 divisors (see below), whose sum is σ = 37373865984. Its totient is φ = 8743064400.

The previous prime is 21100313111. The next prime is 21100313161. The reversal of 21100313122 is 22131300112.

It is a junction number, because it is equal to n+sod(n) for n = 21100313096 and 21100313105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451213 + ... + 495775.

It is an arithmetic number, because the mean of its divisors is an integer number (1167933312).

Almost surely, 2^21100313122 is an apocalyptic number.

21100313122 is a deficient number, since it is larger than the sum of its proper divisors (16273552862).

21100313122 is a wasteful number, since it uses less digits than its factorization.

21100313122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45694.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21100313122 its reverse (22131300112), we get a palindrome (43231613234).

The spelling of 21100313122 in words is "twenty-one billion, one hundred million, three hundred thirteen thousand, one hundred twenty-two".