20101221130 has 8 divisors (see below), whose sum is σ = 36182198052. Its totient is φ = 8040488448.

The previous prime is 20101221083. The next prime is 20101221143. The reversal of 20101221130 is 3112210102.

It can be written as a sum of positive squares in 2 ways, for example, as 20055374689 + 45846441 = 141617^2 + 6771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20101221130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005061047 + ... + 1005061066.

Almost surely, 2^20101221130 is an apocalyptic number.

20101221130 is a deficient number, since it is larger than the sum of its proper divisors (16080976922).

20101221130 is a wasteful number, since it uses less digits than its factorization.

20101221130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010122120.

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

Adding to 20101221130 its reverse (3112210102), we get a palindrome (23213431232).

The spelling of 20101221130 in words is "twenty billion, one hundred one million, two hundred twenty-one thousand, one hundred thirty".