221020221022 has 8 divisors (see below), whose sum is σ = 331541984016. Its totient is φ = 110506226352.

The previous prime is 221020221001. The next prime is 221020221061. The reversal of 221020221022 is 220122020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221020221022² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221020220987 and 221020221005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870423 + ... + 1985074.

It is an arithmetic number, because the mean of its divisors is an integer number (41442748002).

Almost surely, 2^221020221022 is an apocalyptic number.

221020221022 is a deficient number, since it is larger than the sum of its proper divisors (110521762994).

221020221022 is a wasteful number, since it uses less digits than its factorization.

221020221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884162.

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

Adding to 221020221022 its reverse (220122020122), we get a palindrome (441142241144).

Subtracting from 221020221022 its reverse (220122020122), we obtain a square (898200900 = 29970²).

The spelling of 221020221022 in words is "two hundred twenty-one billion, twenty million, two hundred twenty-one thousand, twenty-two".