20102002221 has 16 divisors (see below), whose sum is σ = 30819551744. Its totient is φ = 11416384944.

The previous prime is 20102002211. The next prime is 20102002229. The reversal of 20102002221 is 12220020102.

It is not a de Polignac number, because 20102002221 - 2¹⁷ = 20101871149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102002197 and 20102002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102002229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2932891 + ... + 2939736.

It is an arithmetic number, because the mean of its divisors is an integer number (1926221984).

Almost surely, 2^20102002221 is an apocalyptic number.

20102002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20102002221 is a deficient number, since it is larger than the sum of its proper divisors (10717549523).

20102002221 is a wasteful number, since it uses less digits than its factorization.

20102002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5872800.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20102002221 its reverse (12220020102), we get a palindrome (32322022323).

The spelling of 20102002221 in words is "twenty billion, one hundred two million, two thousand, two hundred twenty-one".