21200202120212 has 48 divisors (see below), whose sum is σ = 38304111132672. Its totient is φ = 10260777552480.

The previous prime is 21200202120211. The next prime is 21200202120263. The reversal of 21200202120212 is 21202120200212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200202120211) 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, 19367213 + ... + 20432555.

It is an arithmetic number, because the mean of its divisors is an integer number (798002315264).

Almost surely, 2^{21200202120212} is an apocalyptic number.

It is an amenable number.

21200202120212 is a deficient number, since it is larger than the sum of its proper divisors (17103909012460).

21200202120212 is a wasteful number, since it uses less digits than its factorization.

21200202120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066428 (or 1066426 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21200202120212 its reverse (21202120200212), we get a palindrome (42402322320424).

The spelling of 21200202120212 in words is "twenty-one trillion, two hundred billion, two hundred two million, one hundred twenty thousand, two hundred twelve".