21200102120212 has 48 divisors (see below), whose sum is σ = 39078065295360. Its totient is φ = 10043641865312.

The previous prime is 21200102120207. The next prime is 21200102120221. The reversal of 21200102120212 is 21202120100212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138595989 + ... + 138748867.

It is an arithmetic number, because the mean of its divisors is an integer number (814126360320).

Almost surely, 2^{21200102120212} is an apocalyptic number.

It is an amenable number.

21200102120212 is a deficient number, since it is larger than the sum of its proper divisors (17877963175148).

21200102120212 is a wasteful number, since it uses less digits than its factorization.

21200102120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167100 (or 167098 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21200102120212 its reverse (21202120100212), we get a palindrome (42402222220424).

The spelling of 21200102120212 in words is "twenty-one trillion, two hundred billion, one hundred two million, one hundred twenty thousand, two hundred twelve".