21102021020010 has 128 divisors (see below), whose sum is σ = 57981456764928. Its totient is φ = 4814853120000.

The previous prime is 21102021019991. The next prime is 21102021020083. The reversal of 21102021020010 is 1002012020112.

It is a super-3 number, since 3×21102021020010³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 873741435 + ... + 873765585.

It is an arithmetic number, because the mean of its divisors is an integer number (452980130976).

Almost surely, 2^{21102021020010} is an apocalyptic number.

21102021020010 is an abundant number, since it is smaller than the sum of its proper divisors (36879435744918).

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

21102021020010 is a wasteful number, since it uses less digits than its factorization.

21102021020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31300.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21102021020010 its reverse (1002012020112), we get a palindrome (22104033040122).

The spelling of 21102021020010 in words is "twenty-one trillion, one hundred two billion, twenty-one million, twenty thousand, ten".