21012100010 has 48 divisors (see below), whose sum is σ = 41581226016. Its totient is φ = 7581756000.

The previous prime is 21012099989. The next prime is 21012100033. The reversal of 21012100010 is 1000121012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1882145 + ... + 1893275.

It is an arithmetic number, because the mean of its divisors is an integer number (866275542).

Almost surely, 2^21012100010 is an apocalyptic number.

21012100010 is a deficient number, since it is larger than the sum of its proper divisors (20569126006).

21012100010 is a wasteful number, since it uses less digits than its factorization.

21012100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411 (or 11280 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21012100010 its reverse (1000121012), we get a palindrome (22012221022).

The spelling of 21012100010 in words is "twenty-one billion, twelve million, one hundred thousand, ten".