221120202021 has 16 divisors (see below), whose sum is σ = 311539752960. Its totient is φ = 139219320240.

The previous prime is 221120202013. The next prime is 221120202029. The reversal of 221120202021 is 120202021122.

It is an interprime number because it is at equal distance from previous prime (221120202013) and next prime (221120202029).

It is not a de Polignac number, because 221120202021 - 2³ = 221120202013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120202029) 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, 20277085 + ... + 20287986.

It is an arithmetic number, because the mean of its divisors is an integer number (19471234560).

Almost surely, 2^221120202021 is an apocalyptic number.

It is an amenable number.

221120202021 is a deficient number, since it is larger than the sum of its proper divisors (90419550939).

221120202021 is a wasteful number, since it uses less digits than its factorization.

221120202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40565176.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221120202021 its reverse (120202021122), we get a palindrome (341322223143).

The spelling of 221120202021 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred two thousand, twenty-one".