220221212021020 has 48 divisors (see below), whose sum is σ = 528747787350720. Its totient is φ = 75473432907264.

The previous prime is 220221212021009. The next prime is 220221212021023. The reversal of 220221212021020 is 20120212122022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221212021023) 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, 322393465 + ... + 323075824.

It is an arithmetic number, because the mean of its divisors is an integer number (11015578903140).

Almost surely, 2^{220221212021020} is an apocalyptic number.

220221212021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220221212021020 is an abundant number, since it is smaller than the sum of its proper divisors (308526575329700).

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

220221212021020 is a wasteful number, since it uses less digits than its factorization.

220221212021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645471742 (or 645471740 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 220221212021020 its reverse (20120212122022), we get a palindrome (240341424143042).

The spelling of 220221212021020 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred twelve million, twenty-one thousand, twenty".