221122010020 has 24 divisors (see below), whose sum is σ = 491671293624. Its totient is φ = 83245933056.

The previous prime is 221122009981. The next prime is 221122010023. The reversal of 221122010020 is 20010221122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39067894336 + 182054115684 = 197656^2 + 426678^2 .

It is not an unprimeable number, because it can be changed into a prime (221122010023) 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, 325179087 + ... + 325179766.

It is an arithmetic number, because the mean of its divisors is an integer number (20486303901).

Almost surely, 2^221122010020 is an apocalyptic number.

221122010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122010020 is an abundant number, since it is smaller than the sum of its proper divisors (270549283604).

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

221122010020 is a wasteful number, since it uses less digits than its factorization.

221122010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650358879 (or 650358877 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221122010020 its reverse (20010221122), we get a palindrome (241132231142).

The spelling of 221122010020 in words is "two hundred twenty-one billion, one hundred twenty-two million, ten thousand, twenty".