201221101030 has 16 divisors (see below), whose sum is σ = 362980275264. Its totient is φ = 80314597440.

The previous prime is 201221101007. The next prime is 201221101031. The reversal of 201221101030 is 30101122102.

It is a self number, because there is not a number n which added to its sum of digits gives 201221101030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221101031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725511 + ... + 21734770.

It is an arithmetic number, because the mean of its divisors is an integer number (22686267204).

Almost surely, 2^201221101030 is an apocalyptic number.

201221101030 is a deficient number, since it is larger than the sum of its proper divisors (161759174234).

201221101030 is a wasteful number, since it uses less digits than its factorization.

201221101030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43460751.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 201221101030 its reverse (30101122102), we get a palindrome (231322223132).

The spelling of 201221101030 in words is "two hundred one billion, two hundred twenty-one million, one hundred one thousand, thirty".