21210221020010 has 48 divisors (see below), whose sum is σ = 41985640938528. Its totient is φ = 7708956134880.

The previous prime is 21210221019901. The next prime is 21210221020067. The reversal of 21210221020010 is 1002012201212.

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, 1952084 + ... + 6799343.

It is an arithmetic number, because the mean of its divisors is an integer number (874700852886).

Almost surely, 2^{21210221020010} is an apocalyptic number.

21210221020010 is a deficient number, since it is larger than the sum of its proper divisors (20775419918518).

21210221020010 is a wasteful number, since it uses less digits than its factorization.

21210221020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753459 (or 8753448 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210221020010 its reverse (1002012201212), we get a palindrome (22212233221222).

The spelling of 21210221020010 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, twenty thousand, ten".