222121110010020 has 192 divisors, whose sum is σ = 678281955025920. Its totient is φ = 53982022828032.

The previous prime is 222121110009977. The next prime is 222121110010027. The reversal of 222121110010020 is 20010011121222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (222121110010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2969615262 + ... + 2969690058.

It is an arithmetic number, because the mean of its divisors is an integer number (3532718515760).

Almost surely, 2^{222121110010020} is an apocalyptic number.

222121110010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222121110010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339140977512960).

222121110010020 is an abundant number, since it is smaller than the sum of its proper divisors (456160845015900).

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

222121110010020 is a wasteful number, since it uses less digits than its factorization.

222121110010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123094 (or 123092 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222121110010020 its reverse (20010011121222), we get a palindrome (242131121131242).

The spelling of 222121110010020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred ten million, ten thousand, twenty".