20103005221 has 16 divisors (see below), whose sum is σ = 21779049600. Its totient is φ = 18445750848.

The previous prime is 20103005203. The next prime is 20103005231. The reversal of 20103005221 is 12250030102.

It is a cyclic number.

It is not a de Polignac number, because 20103005221 - 2⁷ = 20103005093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103005195 and 20103005204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103005231) 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, 1956720 + ... + 1966966.

It is an arithmetic number, because the mean of its divisors is an integer number (1361190600).

Almost surely, 2^20103005221 is an apocalyptic number.

It is an amenable number.

20103005221 is a deficient number, since it is larger than the sum of its proper divisors (1676044379).

20103005221 is a wasteful number, since it uses less digits than its factorization.

20103005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 20103005221 its reverse (12250030102), we get a palindrome (32353035323).

The spelling of 20103005221 in words is "twenty billion, one hundred three million, five thousand, two hundred twenty-one".