221022111120020 has 72 divisors (see below), whose sum is σ = 540257300152416. Its totient is φ = 75732433068096.

The previous prime is 221022111119981. The next prime is 221022111120029. The reversal of 221022111120020 is 20021111220122.

It is a super-3 number, since 3×221022111120020³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022111120029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67714934 + ... + 70903853.

It is an arithmetic number, because the mean of its divisors is an integer number (7503573613228).

Almost surely, 2^{221022111120020} is an apocalyptic number.

221022111120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022111120020 is an abundant number, since it is smaller than the sum of its proper divisors (319235189032396).

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

221022111120020 is a wasteful number, since it uses less digits than its factorization.

221022111120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138620437 (or 138620428 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022111120020 its reverse (20021111220122), we get a palindrome (241043222340142).

The spelling of 221022111120020 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred eleven million, one hundred twenty thousand, twenty".