21200120212002 has 32 divisors (see below), whose sum is σ = 43550178676800. Its totient is φ = 6875085325248.

The previous prime is 21200120212001. The next prime is 21200120212013. The reversal of 21200120212002 is 20021202100212.

It is not an unprimeable number, because it can be changed into a prime (21200120212001) 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, 1936477 + ... + 6793392.

It is an arithmetic number, because the mean of its divisors is an integer number (1360943083650).

Almost surely, 2^{21200120212002} is an apocalyptic number.

21200120212002 is an abundant number, since it is smaller than the sum of its proper divisors (22350058464798).

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

21200120212002 is a wasteful number, since it uses less digits than its factorization.

21200120212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8740850.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21200120212002 its reverse (20021202100212), we get a palindrome (41221322312214).

The spelling of 21200120212002 in words is "twenty-one trillion, two hundred billion, one hundred twenty million, two hundred twelve thousand, two".