201221210202110 has 32 divisors (see below), whose sum is σ = 413941383313920. Its totient is φ = 68990027872032.

The previous prime is 201221210202073. The next prime is 201221210202119. The reversal of 201221210202110 is 11202012122102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221210202119) 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, 58036457 + ... + 61405803.

It is an arithmetic number, because the mean of its divisors is an integer number (12935668228560).

Almost surely, 2^{201221210202110} is an apocalyptic number.

201221210202110 is an abundant number, since it is smaller than the sum of its proper divisors (212720173111810).

201221210202110 is a wasteful number, since it uses less digits than its factorization.

201221210202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222520.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201221210202110 its reverse (11202012122102), we get a palindrome (212423222324212).

The spelling of 201221210202110 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred ten million, two hundred two thousand, one hundred ten".