21201202122010 has 32 divisors (see below), whose sum is σ = 38364981751872. Its totient is φ = 8435456225280.

The previous prime is 21201202121951. The next prime is 21201202122019. The reversal of 21201202122010 is 1022120210212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21201202122019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810394 + ... + 6561946.

It is an arithmetic number, because the mean of its divisors is an integer number (1198905679746).

Almost surely, 2^{21201202122010} is an apocalyptic number.

21201202122010 is a deficient number, since it is larger than the sum of its proper divisors (17163779629862).

21201202122010 is a wasteful number, since it uses less digits than its factorization.

21201202122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753518.

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

Adding to 21201202122010 its reverse (1022120210212), we get a palindrome (22223322332222).

The spelling of 21201202122010 in words is "twenty-one trillion, two hundred one billion, two hundred two million, one hundred twenty-two thousand, ten".