221220200122 has 16 divisors (see below), whose sum is σ = 333452246400. Its totient is φ = 110070769600.

The previous prime is 221220200107. The next prime is 221220200137. The reversal of 221220200122 is 221002022122.

It is an interprime number because it is at equal distance from previous prime (221220200107) and next prime (221220200137).

It is a junction number, because it is equal to n+sod(n) for n = 221220200096 and 221220200105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6879 + ... + 665197.

It is an arithmetic number, because the mean of its divisors is an integer number (20840765400).

Almost surely, 2^221220200122 is an apocalyptic number.

221220200122 is a deficient number, since it is larger than the sum of its proper divisors (112232046278).

221220200122 is a wasteful number, since it uses less digits than its factorization.

221220200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659141.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221220200122 its reverse (221002022122), we get a palindrome (442222222244).

The spelling of 221220200122 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred thousand, one hundred twenty-two".