202121220010 has 32 divisors (see below), whose sum is σ = 391748425920. Its totient is φ = 74802984192.

The previous prime is 202121219999. The next prime is 202121220011. The reversal of 202121220010 is 10022121202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (202121220011) 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, 10065804 + ... + 10085863.

It is an arithmetic number, because the mean of its divisors is an integer number (12242138310).

Almost surely, 2^202121220010 is an apocalyptic number.

202121220010 is a deficient number, since it is larger than the sum of its proper divisors (189627205910).

202121220010 is a wasteful number, since it uses less digits than its factorization.

202121220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20151750.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202121220010 its reverse (10022121202), we get a palindrome (212143341212).

The spelling of 202121220010 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, ten".