221102022021 has 16 divisors (see below), whose sum is σ = 304448782848. Its totient is φ = 142582564800.

The previous prime is 221102021999. The next prime is 221102022047. The reversal of 221102022021 is 120220201122.

It is not a de Polignac number, because 221102022021 - 2¹³ = 221102013829 is a prime.

It is a super-2 number, since 2×221102022021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102022221) 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, 323350 + ... + 739431.

It is an arithmetic number, because the mean of its divisors is an integer number (19028048928).

Almost surely, 2^221102022021 is an apocalyptic number.

It is an amenable number.

221102022021 is a deficient number, since it is larger than the sum of its proper divisors (83346760827).

221102022021 is a wasteful number, since it uses less digits than its factorization.

221102022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065052.

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

Adding to 221102022021 its reverse (120220201122), we get a palindrome (341322223143).

The spelling of 221102022021 in words is "two hundred twenty-one billion, one hundred two million, twenty-two thousand, twenty-one".