21021200210010 has 256 divisors, whose sum is σ = 67912417198080. Its totient is φ = 4021671029760.

The previous prime is 21021200209973. The next prime is 21021200210033. The reversal of 21021200210010 is 1001200212012.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10781919 + ... + 12581421.

It is an arithmetic number, because the mean of its divisors is an integer number (265282879680).

Almost surely, 2^{21021200210010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021200210010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33956208599040).

21021200210010 is an abundant number, since it is smaller than the sum of its proper divisors (46891216988070).

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

21021200210010 is a wasteful number, since it uses less digits than its factorization.

21021200210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799933.

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

Adding to 21021200210010 its reverse (1001200212012), we get a palindrome (22022400422022).

It can be divided in two parts, 210212002 and 10010, that added together give a palindrome (210222012).

The spelling of 21021200210010 in words is "twenty-one trillion, twenty-one billion, two hundred million, two hundred ten thousand, ten".