221121020222220 has 96 divisors (see below), whose sum is σ = 629811129024000. Its totient is φ = 57953208006144.

The previous prime is 221121020222197. The next prime is 221121020222233. The reversal of 221121020222220 is 22222020121122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60883545 + ... + 64413104.

It is an arithmetic number, because the mean of its divisors is an integer number (6560532594000).

Almost surely, 2^{221121020222220} is an apocalyptic number.

221121020222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121020222220 is an abundant number, since it is smaller than the sum of its proper divisors (408690108801780).

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

221121020222220 is a wasteful number, since it uses less digits than its factorization.

221121020222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125297167 (or 125297165 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221121020222220 its reverse (22222020121122), we get a palindrome (243343040343342).

The spelling of 221121020222220 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty million, two hundred twenty-two thousand, two hundred twenty".