222121211121000 has 512 divisors, whose sum is σ = 818903921472000. Its totient is φ = 55536316416000.

The previous prime is 222121211120993. The next prime is 222121211121031. The reversal of 222121211121000 is 121112121222.

222121211121000 is a `hidden beast` number, since 2 + 221 + 21 + 211 + 1 + 210 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 47529120 + ... + 51992880.

It is an arithmetic number, because the mean of its divisors is an integer number (1599421721625).

Almost surely, 2^{222121211121000} is an apocalyptic number.

222121211121000 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 222121211121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409451960736000).

222121211121000 is an abundant number, since it is smaller than the sum of its proper divisors (596782710351000).

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

222121211121000 is a wasteful number, since it uses less digits than its factorization.

222121211121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463907 (or 4463887 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222121211121000 its reverse (121112121222), we get a palindrome (222242323242222).

The spelling of 222121211121000 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand".