21200110000212 has 48 divisors (see below), whose sum is σ = 58114986858432. Its totient is φ = 5930100698880.

The previous prime is 21200110000171. The next prime is 21200110000213. The reversal of 21200110000212 is 21200001100212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200110000213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6177186513 + ... + 6177189944.

It is an arithmetic number, because the mean of its divisors is an integer number (1210728892884).

Almost surely, 2^{21200110000212} is an apocalyptic number.

21200110000212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21200110000212 is an abundant number, since it is smaller than the sum of its proper divisors (36914876858220).

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

21200110000212 is a wasteful number, since it uses less digits than its factorization.

21200110000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12354376488 (or 12354376486 counting only the distinct ones).

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

Adding to 21200110000212 its reverse (21200001100212), we get a palindrome (42400111100424).

The spelling of 21200110000212 in words is "twenty-one trillion, two hundred billion, one hundred ten million, two hundred twelve", and thus it is an aban number.