21200111012010 has 128 divisors (see below), whose sum is σ = 58442033548800. Its totient is φ = 4821345607680.

The previous prime is 21200111011993. The next prime is 21200111012023. The reversal of 21200111012010 is 1021011100212.

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, 56953176 + ... + 57324204.

It is an arithmetic number, because the mean of its divisors is an integer number (456578387100).

Almost surely, 2^{21200111012010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200111012010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29221016774400).

21200111012010 is an abundant number, since it is smaller than the sum of its proper divisors (37241922536790).

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

21200111012010 is a wasteful number, since it uses less digits than its factorization.

21200111012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372416.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21200111012010 its reverse (1021011100212), we get a palindrome (22221122112222).

The spelling of 21200111012010 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twelve thousand, ten".