221020100022 has 16 divisors (see below), whose sum is σ = 446416836912. Its totient is φ = 72943927200.

The previous prime is 221020100009. The next prime is 221020100023. The reversal of 221020100022 is 220001020122.

It is a super-2 number, since 2×221020100022² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221020099980 and 221020100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020100023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182359213 + ... + 182360424.

It is an arithmetic number, because the mean of its divisors is an integer number (27901052307).

Almost surely, 2^221020100022 is an apocalyptic number.

221020100022 is an abundant number, since it is smaller than the sum of its proper divisors (225396736890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221020100022 is a wasteful number, since it uses less digits than its factorization.

221020100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364719743.

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

Adding to 221020100022 its reverse (220001020122), we get a palindrome (441021120144).

The spelling of 221020100022 in words is "two hundred twenty-one billion, twenty million, one hundred thousand, twenty-two".