21021102112 has 24 divisors (see below), whose sum is σ = 41392006992. Its totient is φ = 10508846400.

The previous prime is 21021102107. The next prime is 21021102209. The reversal of 21021102112 is 21120112012.

It is a junction number, because it is equal to n+sod(n) for n = 21021102092 and 21021102101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160287 + ... + 260257.

It is an arithmetic number, because the mean of its divisors is an integer number (1724666958).

Almost surely, 2^21021102112 is an apocalyptic number.

It is an amenable number.

21021102112 is a deficient number, since it is larger than the sum of its proper divisors (20370904880).

21021102112 is an equidigital number, since it uses as much as digits as its factorization.

21021102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106552 (or 106544 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21021102112 its reverse (21120112012), we get a palindrome (42141214124).

The spelling of 21021102112 in words is "twenty-one billion, twenty-one million, one hundred two thousand, one hundred twelve".