201021221010 has 32 divisors (see below), whose sum is σ = 494218029312. Its totient is φ = 52298203520.

The previous prime is 201021220993. The next prime is 201021221161. The reversal of 201021221010 is 10122120102.

201021221010 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 81714714 + ... + 81717173.

It is an arithmetic number, because the mean of its divisors is an integer number (15444313416).

Almost surely, 2^201021221010 is an apocalyptic number.

201021221010 is an abundant number, since it is smaller than the sum of its proper divisors (293196808302).

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

201021221010 is a wasteful number, since it uses less digits than its factorization.

201021221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163431938.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201021221010 its reverse (10122120102), we get a palindrome (211143341112).

The spelling of 201021221010 in words is "two hundred one billion, twenty-one million, two hundred twenty-one thousand, ten".