202121110001010 has 128 divisors (see below), whose sum is σ = 520651053711360. Its totient is φ = 50086014080256.

The previous prime is 202121110001003. The next prime is 202121110001071. The reversal of 202121110001010 is 10100011121202.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10817439 + ... + 22831101.

It is an arithmetic number, because the mean of its divisors is an integer number (4067586357120).

Almost surely, 2^{202121110001010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202121110001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260325526855680).

202121110001010 is an abundant number, since it is smaller than the sum of its proper divisors (318529943710350).

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

202121110001010 is a wasteful number, since it uses less digits than its factorization.

202121110001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014392.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 202121110001010 its reverse (10100011121202), we get a palindrome (212221121122212).

The spelling of 202121110001010 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred ten million, one thousand, ten".