221122220001 has 16 divisors (see below), whose sum is σ = 310357597440. Its totient is φ = 139651359120.

The previous prime is 221122219999. The next prime is 221122220003. The reversal of 221122220001 is 100022221122.

It is an interprime number because it is at equal distance from previous prime (221122219999) and next prime (221122220003).

It is not a de Polignac number, because 221122220001 - 2¹ = 221122219999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122220003) 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, 2429746 + ... + 2519108.

It is an arithmetic number, because the mean of its divisors is an integer number (19397349840).

Almost surely, 2^221122220001 is an apocalyptic number.

It is an amenable number.

221122220001 is a deficient number, since it is larger than the sum of its proper divisors (89235377439).

221122220001 is a wasteful number, since it uses less digits than its factorization.

221122220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132796.

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

Adding to 221122220001 its reverse (100022221122), we get a palindrome (321144441123).

The spelling of 221122220001 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one".